{"product_id":"fish-pen-penicillin-500mg-30-tablets-fish-antibiotics","title":"Fish Pen (Penicillin) 500mg 30 Tablets Fish Antibiotics","description":"\u003ch1\u003eFish Pen Penicillin 500mg – 30 Tablets\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eFish Pen (Penicillin) Tablets\u003c\/strong\u003e are a dependable remedy for bacterial infections in aquarium fish. This broad-spectrum antibiotic targets gram-positive bacteria and is highly effective for conditions like fin rot, columnaris, and gill disease.\u003c\/p\u003e\n\u003cp\u003eFormulated for aquarium use\u003ca href=\"https:\/\/wepetverse.com\/collections\/fish-antibiotics\"\u003e\u003c\/a\u003e, Fish Pen is easy to dose, dissolves rapidly in water, and is suitable for both freshwater and saltwater systems. Whether you’re treating minor symptoms or a widespread bacterial outbreak, Fish Pen helps restore aquatic health quickly and effectively.\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 Treats a wide range of gram-positive bacterial infections common in fish.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon Fish Infections:\u003c\/strong\u003e Effective against fin rot, mouth rot, gill disease, and skin lesions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Application:\u003c\/strong\u003e Can be dissolved directly in tank water or added to food if advised.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafe for Most Fish:\u003c\/strong\u003e Relatively nontoxic when used correctly across freshwater and select marine species.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid Recovery:\u003c\/strong\u003e Stops bacterial development, reduces stress, and speeds recovery time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents Spread:\u003c\/strong\u003e Helps contain the infection, protecting healthy fish from contamination.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDirections\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAdd one 500mg tablet per 20 gallons of aquarium water.\u003c\/li\u003e\n\u003cli\u003eRepeat the dosage every 24 hours with a partial water change in between.\u003c\/li\u003e\n\u003cli\u003eContinue treatment for 5–10 days depending on infection severity.\u003c\/li\u003e\n\u003cli\u003eIf no improvement after 5 days, stop treatment and consult a fish health expert.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCautions\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFor aquarium use only – not for human consumption.\u003c\/li\u003e\n\u003cli\u003eNot for fish intended for human food use.\u003c\/li\u003e\n\u003cli\u003eRemove invertebrates such as shrimp and snails before dosing.\u003c\/li\u003e\n\u003cli\u003eMonitor water quality closely, as Penicillin may affect beneficial bacteria.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eStorage Instructions\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eStore at 59°–86°F (15°–30°C) in a cool, dry place.\u003c\/li\u003e\n\u003cli\u003eKeep lid tightly sealed to protect tablets from moisture and light.\u003c\/li\u003e\n\u003cli\u003eCheck expiration date for product freshness.\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 a wide range of options including Ground, Express, and International delivery. View shipping policy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReturns:\u003c\/strong\u003e If you need to return or exchange this product, please review our refund policy here.\u003c\/p\u003e\n\u003ch2\u003eFAQs – Fish Pen Penicillin 500mg 30 Tablets\u003c\/h2\u003e\n\u003ch3\u003eWhat does Fish Pen treat?\u003c\/h3\u003e\n\u003cp\u003eFish Pen targets gram-positive bacteria and is effective against infections such as fin rot, gill disease, and columnaris.\u003c\/p\u003e\n\u003ch3\u003eCan it be used in saltwater aquariums?\u003c\/h3\u003e\n\u003cp\u003eYes. Fish Pen is effective in both freshwater and saltwater tanks when dosed correctly.\u003c\/p\u003e\n\u003ch3\u003eWill it affect the biological filter?\u003c\/h3\u003e\n\u003cp\u003eIt can. Monitor water quality carefully and reintroduce beneficial bacteria if needed post-treatment.\u003c\/p\u003e\n\u003ch3\u003eIs Fish Pen safe for invertebrates?\u003c\/h3\u003e\n\u003cp\u003eNo. Remove shrimp, snails, and crabs before starting treatment, as Penicillin may harm them.\u003c\/p\u003e\n\u003ch3\u003eCan Fish Pen be used for bettas and small species?\u003c\/h3\u003e\n\u003cp\u003eYes, as long as proper dosing is calculated based on tank volume. Avoid overdosing small tanks.\u003c\/p\u003e\n\u003ch3\u003eDoes it discolor aquarium water?\u003c\/h3\u003e\n\u003cp\u003eNo. Fish Pen dissolves clearly and does not stain or cloud the water.\u003c\/p\u003e\n\u003ch3\u003eIs it safe for use in planted tanks?\u003c\/h3\u003e\n\u003cp\u003eGenerally, yes. Fish Pen is not known to harm most live plants.\u003c\/p\u003e\n\u003ch3\u003eCan I use expired Fish Pen?\u003c\/h3\u003e\n\u003cp\u003eNo. Always check the packaging and avoid use past the expiration date for safety and effectiveness.\u003c\/p\u003e\n\u003ch2\u003eRelated Products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFish Pen Penicillin 500mg – 60 Tablets\u003c\/li\u003e\n\u003cli\u003eFish Mox Amoxicillin 500mg – 100 Capsules\u003c\/li\u003e\n\u003cli\u003eFish Zithro Azithromycin 250mg – 30 Tablets\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":58524735996278,"sku":"AS-006-AF","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/8313\/5862\/files\/FishPenicillin500mg30Tablets.png?v=1787533414","url":"https:\/\/wepetverse.com\/products\/fish-pen-penicillin-500mg-30-tablets-fish-antibiotics","provider":"WePetVerse","version":"1.0","type":"link"}