While I agree with the soap thing, and also agree that there are better alternatives than bleach (oxyclene for one) as responsible hobbyists, we should have de-chlorinator on hand at all times to treat our tap water. In a dry tank cleaned with bleach, if you rinse a few times and then use chlor out, your tank should be ok.Blackghostknife said:never use any kind off soap or bleach or cleaning sulotion in a tank dry or full.