NT Labs Koi Care Formalin 7 treats persistent parasite infections of pond fish such as White Spot, Trichodina, Costia and Chilodonella.
• 7 Day application for persistent parasite infections
• Highly concentrated - 30% Formaldehyde
• Treats White Spot, Costia, Trichodina
• Excellent value size
Directions: Use when fish are flashing against rocks, gasping at the surface etc. A course of treatment for up to maximum 7 applications is recommended. One single dose may however be all that is necessary. Do not repeat treatment if after 7 days fish are recovered and well. You can add one dose every week for 7 weeks or stop after one or two doses have succesfully eradicated the problem. Switch off UV until 5 days after the final dose has been added. Formalin 7 may be used with Malachite 7. Can be used in Ponds with low level salt ( 1 to 1.5 oz / gallon salt ) with no detrimental side effects.
Dosage: 10ml treats 700 litres; 2.5 litres treats up to 7 x 25,000 litres