hi richard, well i never got told about the tap water, or ro water for that matter, at the moment i have a tetratest for no2 which has been and still is coming out at the correct colour and 0.3mg/l so im assuming that is ok, and the sg is 1.024 or 32 salinity, the tank is two feet deep and at the moment i have quite a bit of coral that i bought at the shop, not live stuff in water but was in a sack. the fish i now have, got it wrong just now, are three clowns, one yellow tang, one damsel a couple of shrimps and a feather duster, all seem to be thriving, feeding on brine shrimp and they soon eat all that, just the tank and the algae prob really, thanks for you help so far, maybe my guy isnt so well up on marines, although he has a lot of tanks of them and they all look healthy !!! taking it easy at the moment as the tank is only about five weeks old at the moment. we want to add quite a few more fish yet as the tank is quite large, would like a couple of anenomes for the clowns but hard to come by and i dont want to kill any of the fish by getting it wrong !!!!
regards keith