{"product_id":"kordon-malachite-green","title":"Kordon Malachite Green","description":"\u003cdiv style=\"background:#E3F2FD;border-left:4px solid #1E88E5;padding:10px 14px;margin:0 0 14px;font-size:0.95em;\"\u003e\n\u003cstrong\u003eNot reef-safe.\u003c\/strong\u003e Malachite green is lethal to shrimp, snails, crabs, and other invertebrates and can stain silicone and decor. Treat in a quarantine or hospital tank, or a fish-only system, and remove activated carbon while dosing.\n\u003c\/div\u003e\n\n\u003cp\u003e\u003cstrong\u003eKordon Malachite Green\u003c\/strong\u003e is a proven, zinc-free treatment for the most common external parasites and fungal infections of both freshwater and marine fish. It is a go-to medication for outbreaks of ich and velvet and for the cottony fungus that often follows an injury or stress. Reach for it whenever you need to clear an external parasite or fungus in a hospital tank. Browse the rest of our \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/medication\"\u003efish medications\u003c\/a\u003e to round out your QT kit.\u003c\/p\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eWhat It Treats\u003c\/h3\u003e\n\u003cp\u003eUsed as directed, Kordon Malachite Green controls and helps prevent these common external parasites and fungal problems in freshwater and marine fish:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIch (white spot):\u003c\/strong\u003e freshwater \u003cem\u003eIchthyophthirius\u003c\/em\u003e and marine \u003cem\u003eCryptocaryon\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVelvet:\u003c\/strong\u003e \u003cem\u003eOodinium\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOther protozoan parasites:\u003c\/strong\u003e Costia, Chilodonella, Trichodina, Epistylis, and Ambiphyra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal fungus:\u003c\/strong\u003e cottony \u003cem\u003eSaprolegnia\u003c\/em\u003e on fish and on fish eggs, plus fungus associated with fin and tail rot\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eHow to Use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDose to the label.\u003c\/strong\u003e Follow the dosing chart on the bottle for your exact water volume; do not overdose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePull the carbon.\u003c\/strong\u003e Remove activated carbon and turn off UV sterilizers and ozone during treatment, since they strip the medication out of the water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreat in quarantine.\u003c\/strong\u003e A hospital or QT tank is ideal. Do not dose a display tank that holds invertebrates or corals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRepeat for ich.\u003c\/strong\u003e Ich and velvet have a multi-day life cycle, so repeat doses per the label, with a partial water change between treatments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear it after.\u003c\/strong\u003e Once treatment is finished, run fresh activated carbon to remove the residual dye and color from the water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGo gentle on sensitive fish.\u003c\/strong\u003e Use a reduced dose with scaleless and sensitive species, and watch the fish closely.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;font-size:0.93em;margin:4px 0 8px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eKordon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eMalachite green (zinc-free)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e\u003cstrong\u003eTreats\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eExternal protozoan parasites \u0026amp; fungus (ich, velvet, fungus, more)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e\u003cstrong\u003eWater Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eFreshwater \u0026amp; Saltwater fish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e4 fl oz (118 mL)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e\u003cstrong\u003eReef Safe\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eNo, harms invertebrates and corals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003e\u003cstrong\u003eUse In\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eQuarantine, hospital, or fish-only tank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/kordon-methylene-blue-anti-fungal-treatment\"\u003eKordon Methylene Blue\u003c\/a\u003e for fungus, ammonia and nitrite detox, and a gentle dip option\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-cupramine-copper-ich-velvet-treatment\"\u003eSeachem Cupramine\u003c\/a\u003e for copper-based marine ich and velvet treatment in QT\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/fritz-maracyn\"\u003eFritz Maracyn\u003c\/a\u003e if a secondary bacterial infection sets in\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-tidal-matrix-carbon-activated-carbon-pouches\"\u003eActivated carbon\u003c\/a\u003e to clear the medication once treatment is done\u003c\/li\u003e\n\u003cli\u003eBrowse all \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/medication\"\u003emedications\u003c\/a\u003e and \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/maintenance-water-care\"\u003ewater care\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan I dose this in my reef or planted display?\u003c\/strong\u003e\u003cbr\u003eNo. Malachite green is harmful to invertebrates and corals, so use it in a quarantine or hospital tank, or a fish-only system without inverts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it treat marine ich?\u003c\/strong\u003e\u003cbr\u003eYes, it controls marine ich (\u003cem\u003eCryptocaryon\u003c\/em\u003e) as well as freshwater ich. Treating in a dedicated QT tank gives the best results.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it stain my tank or hands?\u003c\/strong\u003e\u003cbr\u003eMalachite green is a strong dye and can stain silicone, decor, and clothing. Handle carefully and run carbon afterward to clear the color.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy remove the carbon?\u003c\/strong\u003e\u003cbr\u003eActivated carbon, UV, and ozone all pull the medication out of the water, so disable them during treatment and bring carbon back online once you are finished.\u003c\/p\u003e","brand":"Kordon","offers":[{"title":"Default Title","offer_id":48888937316571,"sku":"37444","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/image_bedf4e46-a3c3-4555-9ed4-f9004b89a4a8.png?v=1781790875","url":"https:\/\/squeakysaquatics.com\/products\/kordon-malachite-green","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}