My pair of B/W ocellaris clowns has brook, white stuff on their bodies and rotting fins. I read that using baths with formalin will help cure it, has anyone try this or have experience? They say 1 bath for 45 mins every other day for a total of 3. Do I use plain distilled water or mix it with salt, also after the bath, where should I put them? Also have a pair of true percs in same tank, should I treat both pairs? On my way to grab formalin. Thanks for any advice.