{"product_id":"blue-danios-danio-rerio","title":"Blue Danio (Danio kerri)","description":"\n\u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\n\u003ctitle\u003eBlue Danio Care Guide | Superior Shrimp \u0026amp; Aquatics\u003c\/title\u003e\n\u003cmeta name=\"description\" content=\"Complete Blue Danio (Danio kerri) care guide covering water parameters, tank setup, diet, tank mates, shrimp compatibility, and breeding tips from Superior Shrimp \u0026amp; Aquatics.\"\u003e\n\u003clink href=\"https:\/\/fonts.googleapis.com\/css2?family=Playfair+Display:wght@400;600;700\u0026amp;family=DM+Sans:wght@300;400;500\u0026amp;display=swap\" rel=\"stylesheet\"\u003e\n\u003cstyle\u003e\n  .ssa-blog*,.ssa-blog *::before,.ssa-blog *::after{box-sizing:border-box}\n  .ssa-blog{font-family:'DM Sans',sans-serif!important;color:#1e1a1a!important;background:#fff!important;line-height:1.75!important;-webkit-font-smoothing:antialiased}\n  .ssa-blog 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1.6rem!important;margin-bottom:0.35rem!important;font-size:1.1rem!important;color:#6b6060!important;font-weight:300!important;line-height:1.65!important;position:relative!important}\n  .ssa-blog .bullet-list .bl-item::before{content:'\u0026bull;'!important;color:#F40909!important;font-size:1.2rem!important;position:absolute!important;left:0!important;top:0.3rem!important}\n  .ssa-blog .bullet-list .bl-item strong{color:#111111!important;font-weight:500!important}\n  .ssa-blog .spaced-list{margin:0.75rem 0 1.4rem!important;padding:0!important}\n  .ssa-blog .spaced-list .sl-item{display:block!important;padding:0.85rem 1.1rem 0.85rem 2.4rem!important;margin-bottom:0.6rem!important;font-size:1.1rem!important;color:#6b6060!important;font-weight:300!important;line-height:1.7!important;background:#f7f3ee!important;border-radius:10px!important;border:1px solid #e8e2da!important;position:relative!important}\n  .ssa-blog .spaced-list .sl-item::before{content:'\u0026rarr;'!important;color:#b50707!important;font-size:1rem!important;font-weight:500!important;position:absolute!important;left:1rem!important;top:0.9rem!important}\n  .ssa-blog .spaced-list .sl-item strong{color:#111111!important;font-weight:500!important}\n  .ssa-blog .table-wrap{overflow-x:auto!important;margin:1.8rem 0 2rem!important;border-radius:12px!important;border:1px solid #e8e2da!important}\n  .ssa-blog table{width:100%!important;border-collapse:collapse!important;font-size:1.05rem!important}\n  .ssa-blog thead th{padding:0.85rem 1.2rem!important;text-align:left!important;font-weight:500!important;font-size:0.95rem!important;color:#fff!important;background:#111111!important}\n  .ssa-blog tbody tr:nth-child(even){background:#f7f3ee!important}\n  .ssa-blog tbody tr:nth-child(odd){background:#fff!important}\n  .ssa-blog tbody td{padding:0.75rem 1.2rem!important;color:#6b6060!important;font-size:1.05rem!important;border-bottom:1px solid #e8e2da!important;font-weight:300!important}\n  .ssa-blog tbody tr:last-child td{border-bottom:none!important}\n  @media(max-width:600px){.ssa-blog .hero{padding:2.5rem 1.5rem 2rem!important}}\n\u003c\/style\u003e\n\n\u003cdiv class=\"ssa-blog\"\u003e\n  \u003cdiv class=\"hero\"\u003e\n    \u003cspan class=\"hero-tag\"\u003eMicro Fish Care Guide\u003c\/span\u003e\n    \u003ch1\u003eBlue Danio\u003c\/h1\u003e\n    \u003cp class=\"hero-sub\"\u003eAlso known as Kerr's Danio or Turquoise Danio — a stunning, electric blue schooling fish that's hardy, peaceful, and underrated.\u003c\/p\u003e\n    \u003cdiv class=\"hero-meta\"\u003e\n      \u003cspan\u003e🐟 Danio kerri\u003c\/span\u003e\n      \u003cspan\u003e⭐ Beginner Friendly\u003c\/span\u003e\n      \u003cspan\u003e🦐 Shrimp Compatible\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"article-wrap\"\u003e\n    \u003cdiv class=\"intro-callout\"\u003e\n      The Blue Danio is one of the most visually striking nano fish available and one of the most overlooked. Their iridescent blue sides with gold horizontal lines pop dramatically against dark substrate and dense planting. They're hardy, peaceful, and easy to care for — a fantastic choice for community tanks and planted setups alike.\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"prose\"\u003e\n\n      \u003ch2\u003eQuick Stats\u003c\/h2\u003e\n      \u003cdiv class=\"stat-row\"\u003e\n        \u003cdiv class=\"stat-card\"\u003e\n\u003cspan class=\"stat-value\"\u003e2\"\u003c\/span\u003e\u003cspan class=\"stat-label\"\u003eMax Size\u003c\/span\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"stat-card\"\u003e\n\u003cspan class=\"stat-value\"\u003e15 gal\u003c\/span\u003e\u003cspan class=\"stat-label\"\u003eMin Tank Size\u003c\/span\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"stat-card\"\u003e\n\u003cspan class=\"stat-value\"\u003e5–8 yrs\u003c\/span\u003e\u003cspan class=\"stat-label\"\u003eLifespan\u003c\/span\u003e\n\u003c\/div\u003e\n        \u003cdiv class=\"stat-card\"\u003e\n\u003cspan class=\"stat-value\"\u003e6+\u003c\/span\u003e\u003cspan class=\"stat-label\"\u003eMin School Size\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003c\/div\u003e\n\n      \u003ch2\u003eWater Parameters\u003c\/h2\u003e\n      \u003cdiv class=\"table-wrap\"\u003e\n        \u003ctable\u003e\n          \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eIdeal Range\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n          \u003ctbody\u003e\n            \u003ctr\u003e\n\u003ctd\u003eTemperature\u003c\/td\u003e\n\u003ctd\u003e70–78°F\u003c\/td\u003e\n\u003ctd\u003eSlightly cooler than most tropicals; stable temp important\u003c\/td\u003e\n\u003c\/tr\u003e\n            \u003ctr\u003e\n\u003ctd\u003epH\u003c\/td\u003e\n\u003ctd\u003e6.5–7.5\u003c\/td\u003e\n\u003ctd\u003eSlightly acidic to neutral preferred\u003c\/td\u003e\n\u003c\/tr\u003e\n            \u003ctr\u003e\n\u003ctd\u003eHardness (GH)\u003c\/td\u003e\n\u003ctd\u003e6–16 dGH\u003c\/td\u003e\n\u003ctd\u003eAdaptable; soft to moderately hard\u003c\/td\u003e\n\u003c\/tr\u003e\n            \u003ctr\u003e\n\u003ctd\u003eAmmonia \/ Nitrite\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003ctd\u003eCycled tank required\u003c\/td\u003e\n\u003c\/tr\u003e\n            \u003ctr\u003e\n\u003ctd\u003eNitrate\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;20 ppm\u003c\/td\u003e\n\u003ctd\u003eWeekly water changes to keep low\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003c\/tbody\u003e\n        \u003c\/table\u003e\n      \u003c\/div\u003e\n\n      \u003ch2\u003eTank Setup\u003c\/h2\u003e\n      \u003cp\u003eBlue Danios originate from clear, slow-moving streams and floodplains of the Malay Peninsula and southern Thailand. They appreciate good water movement and oxygenation, a dark substrate, and both open swimming space and planted cover.\u003c\/p\u003e\n      \u003cdiv class=\"spaced-list\"\u003e\n        \u003cspan class=\"sl-item\"\u003e\u003cstrong\u003eTank size\u003c\/strong\u003e — 15 gallons minimum for a school of 6. A longer tank is better than a tall one — they're active swimmers and appreciate the horizontal space.\u003c\/span\u003e\n        \u003cspan class=\"sl-item\"\u003e\u003cstrong\u003ePlants\u003c\/strong\u003e — Dense planting enhances their coloration significantly. Hardy species like anubias, java fern, bolbitis, and microsorum work well attached to driftwood and rock. Floating plants help diffuse light.\u003c\/span\u003e\n        \u003cspan class=\"sl-item\"\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e — Dark sand or fine gravel strongly recommended. Their blue coloring appears paler over light substrate.\u003c\/span\u003e\n        \u003cspan class=\"sl-item\"\u003e\u003cstrong\u003eFlow\u003c\/strong\u003e — Moderate. They enjoy swimming against a gentle current. A HOB or canister with some flow works well — they'll actively play in the current near filter outlets.\u003c\/span\u003e\n        \u003cspan class=\"sl-item\"\u003e\u003cstrong\u003eLighting\u003c\/strong\u003e — Moderate, not too bright. Dark substrate and dim lighting bring out their best color.\u003c\/span\u003e\n        \u003cspan class=\"sl-item\"\u003e\u003cstrong\u003eLid\u003c\/strong\u003e — Required. Danios jump.\u003c\/span\u003e\n      \u003c\/div\u003e\n\n      \u003ch2\u003eDiet \u0026amp; Feeding\u003c\/h2\u003e\n      \u003cp\u003eBlue Danios are omnivores and unfussy eaters. They feed primarily in the middle and upper water column. A varied diet keeps their coloring vibrant and their immune system strong.\u003c\/p\u003e\n      \u003cdiv class=\"bullet-list\"\u003e\n        \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eStaple:\u003c\/strong\u003e High-quality tropical flakes or small pellets\u003c\/span\u003e\n        \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eProtein:\u003c\/strong\u003e Frozen or live foods — baby brine shrimp, daphnia, micro worms, bloodworms\u003c\/span\u003e\n        \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eFrequency:\u003c\/strong\u003e Twice daily in small amounts — only what they can eat in 2–3 minutes\u003c\/span\u003e\n        \u003cspan class=\"bl-item\"\u003eRemove uneaten food to maintain water quality\u003c\/span\u003e\n      \u003c\/div\u003e\n\n      \u003ch2\u003eTemperament \u0026amp; Tank Mates\u003c\/h2\u003e\n      \u003cp\u003eBlue Danios are peaceful, active schoolers. They do best in groups of 6 or more — smaller groups lead to stress and dull coloring. They occupy the middle water column and get along well with most community fish of similar size and temperament.\u003c\/p\u003e\n      \u003cdiv class=\"bullet-list\"\u003e\n        \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eGood tank mates:\u003c\/strong\u003e Small tetras, rasboras, corydoras, otocinclus, other peaceful community fish of similar size\u003c\/span\u003e\n        \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eAvoid:\u003c\/strong\u003e Fish large enough to eat them, aggressive species, or slow-moving fish with elaborate finnage — Blue Danios can be nippy with delicate fins\u003c\/span\u003e\n        \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eSexing:\u003c\/strong\u003e Males are slimmer and more colorful. Females are larger and noticeably rounder when conditioned for spawning.\u003c\/span\u003e\n      \u003c\/div\u003e\n\n      \u003ch2\u003eShrimp Compatibility\u003c\/h2\u003e\n      \u003cdiv class=\"info-box\"\u003e\n        \u003cp\u003e\u003cstrong\u003eGenerally compatible with adult shrimp.\u003c\/strong\u003e Blue Danios are peaceful enough to coexist with adult Neocaridina and Caridina shrimp in a well-planted tank. However, they will prey on shrimplets and baby shrimp. If maintaining a breeding shrimp colony alongside Blue Danios, provide dense moss, java fern, and plenty of cover to give juvenile shrimp places to hide.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003ch2\u003eBreeding\u003c\/h2\u003e\n      \u003cp\u003eBlue Danios are easy to breed and will often spawn in a community tank without any setup — though fry survival in a community setting is low without intervention. A separate breeding tank significantly improves results.\u003c\/p\u003e\n      \u003cdiv class=\"spaced-list\"\u003e\n        \u003cspan class=\"sl-item\"\u003e\u003cstrong\u003eTrigger\u003c\/strong\u003e — Spawning is often triggered by morning sunlight hitting the tank glass. Raise the temperature slightly to the higher end of their range to encourage breeding behavior.\u003c\/span\u003e\n        \u003cspan class=\"sl-item\"\u003e\u003cstrong\u003eBreeding tank\u003c\/strong\u003e — A shallow tank with a marble or large-pebble substrate (so eggs fall between gaps and out of reach of adults) and clumps of java moss. Keep it long and shallow.\u003c\/span\u003e\n        \u003cspan class=\"sl-item\"\u003e\u003cstrong\u003eSpawning\u003c\/strong\u003e — Females scatter up to 400 eggs. Remove adults immediately after spawning — they will eat the eggs without hesitation.\u003c\/span\u003e\n        \u003cspan class=\"sl-item\"\u003e\u003cstrong\u003eFry\u003c\/strong\u003e — Eggs hatch in 2–3 days. Feed infusoria or powdered fry food first, then transition to baby brine shrimp as they grow.\u003c\/span\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"highlight-box\"\u003e\n        \u003cp\u003eBlue Danios are sometimes called Turquoise Danios or Splendid Danios. Under the right conditions — dark substrate, dim lighting, and dense planting — their electric blue coloring is genuinely striking and worth showing off.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cp\u003eBrowse our \u003ca href=\"\/es\/collections\/aquatic-plants-parent\" title=\"Aquatic plants for freshwater tanks | vibrant \u0026amp; healthy ecosystems – superior shrimp \u0026amp; aquatics\" aria-label=\"Aquatic plants for freshwater tanks | vibrant \u0026amp; healthy ecosystems – superior shrimp \u0026amp; aquatics\"\u003eaquatic plants\u003c\/a\u003e to build the planted setup Blue Danios thrive in, or check our \u003ca href=\"\/es\/collections\/food\" title=\"Aquarium food \u0026amp; supplements | nutrition for fish, inverts \u0026amp; plants – superior shrimp \u0026amp; aquatics\" aria-label=\"Aquarium food \u0026amp; supplements | nutrition for fish, inverts \u0026amp; plants – superior shrimp \u0026amp; aquatics\"\u003efood and supplements\u003c\/a\u003e for feeding options.\u003c\/p\u003e\n\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Superior Shrimp \u0026 Aquatics","offers":[{"title":"1","offer_id":45041258430672,"sku":null,"price":3.5,"currency_code":"USD","in_stock":true},{"title":"3","offer_id":45041258463440,"sku":null,"price":10.5,"currency_code":"USD","in_stock":true},{"title":"6","offer_id":45041258496208,"sku":null,"price":21.0,"currency_code":"USD","in_stock":true},{"title":"12","offer_id":45041258528976,"sku":null,"price":42.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0639\/2895\/9184\/files\/blue-danio-danio-kerri-slender-silver-bodied-fish-single-bold-818.webp?v=1782338942","url":"https:\/\/www.superiorshrimpaquatics.com\/es\/products\/blue-danios-danio-rerio","provider":"Superior Shrimp \u0026 Aquatics","version":"1.0","type":"link"}