Before showing my father this site, he had bought some linear quat algaecide of the HTH & PoolBrand variety. Since he can't bring them to the Philippines and is a new convert of the BBB method (plus some judicious use of polyquat), he has dumped said algaecide on me. Besides the possible foaming, what other side effects are associated with these products? Are they effective at all or should I just pour them down the drain? I believe it was noted that ammonium chlorides do kill algae, but with the side effect of reducing FC and increasing CC.