Check the listing for details. SEACHEM PARAGUARD Aquarium Fish Medication Ich Parasite Ick. Condition: New. Listed at 11.25 USD. SEACHEM PARAGUARD Auction is for ( 1 ) : SEACHEM PARAGUARD ParaGuardª is the only fish and filter safe aldehyde based (10% by weight) parasite control product available. Unlike highly toxic and difficult to use formalin based medications.ParaGuardª contains no formaldehyde or methanol and will not alter pH. ParaGuardª employs a proprietary, synergistic blend of aldehydes, malachite green, and fish protective polymers that effectively and efficiently eradicates many ectoparasites (e.g. ich, etc.) and external fungal/bacterial/viral lesions (e.g., fin rot). It is particularly useful in hospital and receiving tanks for new fish and whenever new fish are introduced to a community tank. DIRECTIONS: In the aquarium, use 1 mL (top mark on enclosed dispenser) to every 8 L (2.1 gallons*). Repeat daily as required as long as fish show no stress. For 1 hour dips, use 3 mL per 4 L (1 gallon*). Dips may be extended if fish show no evidence of stress. Please feel free to contact me for International and combined auction shipping rates or with any questions or concerns that you may have about my products. Thank you !