{"product_id":"fish-pen-penicillin-500mg-60-tablets-fish-antibiotics","title":"Fish Pen (Penicillin) 500mg 60 Tablets Fish Antibiotics","description":"\u003ch1\u003eFish Pen Penicillin 500mg – 60 Tablets\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eFish Pen (Penicillin) Tablets\u003c\/strong\u003e are a dependable broad-spectrum antibiotic designed for aquarium fish. Fish Pen targets gram-positive bacterial infections such as fin rot, gill disease, mouth rot, and skin lesions, delivering fast-acting relief and improved aquatic health.\u003c\/p\u003e\n\u003cp\u003ePerfect for both beginner and experienced aquarists, Fish Pen is safe for use in freshwater and saltwater aquariums and dissolves quickly for even treatment distribution. Restore your fish’s health and prevent the spread of infections with this essential fish medication.\u003c\/p\u003e\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Spectrum of Action:\u003c\/strong\u003e Effective against gram-positive bacteria like Streptococcus and Aeromonas species.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffective Against Common Infections:\u003c\/strong\u003e Treats fin rot, gill disease, mouth fungus, and other bacterial conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Application:\u003c\/strong\u003e Tablets dissolve quickly in water for simple dosing or can be applied with food.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Healing Support:\u003c\/strong\u003e Reduces fish stress and promotes visible recovery within days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLimits Infection Spread:\u003c\/strong\u003e Stops infections before they can affect other healthy fish in your tank.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDirections for Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAdd one 500mg tablet per 20 gallons of aquarium water.\u003c\/li\u003e\n\u003cli\u003eRepeat dosage every 24 hours for 5–10 days depending on the severity of the infection.\u003c\/li\u003e\n\u003cli\u003eMake a partial water change between treatments to maintain water quality.\u003c\/li\u003e\n\u003cli\u003eIf no improvement is seen within 5 days, stop use and consult a veterinarian or aquarist.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eStorage Instructions\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eStore tightly closed at 59°–86°F (15°–30°C) in a cool, dry place.\u003c\/li\u003e\n\u003cli\u003eKeep out of reach of children and pets.\u003c\/li\u003e\n\u003cli\u003eDo not use after expiration date printed on packaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eImportant Cautions\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFor ornamental aquarium use only. Not for use with fish intended for human consumption.\u003c\/li\u003e\n\u003cli\u003eRemove shrimp, snails, and other invertebrates prior to treatment as Penicillin may harm them.\u003c\/li\u003e\n\u003cli\u003eMonitor ammonia, nitrite, and nitrate levels during treatment to ensure healthy tank balance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e We offer Ground, Express, Priority, and International shipping options. View shipping policy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReturns:\u003c\/strong\u003e Having an issue? Review our refund policy for return instructions.\u003c\/p\u003e\n\u003ch2\u003eFAQs – Fish Pen Penicillin 500mg 60 Tablets\u003c\/h2\u003e\n\u003ch3\u003eWhat infections does Fish Pen treat?\u003c\/h3\u003e\n\u003cp\u003eIt treats gram-positive bacterial infections including fin rot, gill disease, mouth fungus, and columnaris.\u003c\/p\u003e\n\u003ch3\u003eCan I use it in saltwater aquariums?\u003c\/h3\u003e\n\u003cp\u003eYes, Fish Pen is safe for both saltwater and freshwater tanks.\u003c\/p\u003e\n\u003ch3\u003eIs it safe for shrimp and snails?\u003c\/h3\u003e\n\u003cp\u003eNo. Remove invertebrates during treatment to avoid harm.\u003c\/p\u003e\n\u003ch3\u003eDoes it impact beneficial bacteria?\u003c\/h3\u003e\n\u003cp\u003eYes, to a degree. Monitor water quality and supplement beneficial bacteria post-treatment if needed.\u003c\/p\u003e\n\u003ch3\u003eWill it discolor water?\u003c\/h3\u003e\n\u003cp\u003eNo, Fish Pen dissolves clearly and does not affect tank appearance.\u003c\/p\u003e\n\u003ch3\u003eCan I use Fish Pen for betta fish?\u003c\/h3\u003e\n\u003cp\u003eYes, but ensure the proper dosage is used based on smaller tank volumes.\u003c\/p\u003e\n\u003ch3\u003eDoes Fish Pen expire?\u003c\/h3\u003e\n\u003cp\u003eYes, always check the expiration date and use before it passes.\u003c\/p\u003e\n\u003ch3\u003eIs it safe for planted aquariums?\u003c\/h3\u003e\n\u003cp\u003eGenerally, yes. Fish Pen does not harm most common aquarium plants.\u003c\/p\u003e\n\u003ch2\u003eRelated Products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFish Pen Penicillin 500mg – 30 Tablets\u003c\/li\u003e\n\u003cli\u003eFish Mox Amoxicillin 250mg – 100 Capsules\u003c\/li\u003e\n\u003cli\u003eFish Flex Cephalexin 500mg – 100 Capsules\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable style=\"width: 72.2183%; height: 259px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 312.6px;\"\u003e\n\u003ctd style=\"width: 49.7738%; height: 312.6px;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.7738%; height: 312.6px;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"WePetVerse","offers":[{"title":"Default Title","offer_id":58524736061814,"sku":"AS-022-AF","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/8313\/5862\/files\/FishPenicillin500mg60Tablets.png?v=1787533415","url":"https:\/\/wepetverse.com\/products\/fish-pen-penicillin-500mg-60-tablets-fish-antibiotics","provider":"WePetVerse","version":"1.0","type":"link"}