don't worry about "the crap" it will be fine. keep using wool (a small amount) as a prefilter and you'll be fine. and although the Cuban can change color rapidly, it will likely be a gradual process of recovery for yours since it's been exposed to quite a bit of ammo-tox and who knows what else for the past several days. be patient--xander13;1539293; said:but what happens to the crap when i stop using wool? they'll clog the bioballs wont they?? oh yeah i removed the frt. yet the cuban is still dark coloured
--solomon