Ok here's my scenario I've bought like 10 clown loaches about 3 weeks ago, have them in a 55g they started having ich the day after I bought them. I started treating them with noxich untill now they still have it so I put them in a quarintine tank and started treating them then one or 2 would die a day I can't shake the ich. Help please!! And yes I do 25% changes.