My husband and i are new to the hobby and started our tank about 3 months ago. we got 2 clownfish to start wih since we were told they very hardy fish and we hadn't established our tank for very long. after only a day or so we noticed white dots on the fish and told a guy at the local pet store and he gave us Mardel Marcacyn medicine to treat them and it seemed to work because the spots went away. then we got some crabs an sea snails and an anemone and by the next day the clowns had spots again.. this time it seemed more aggresive. i went back to the petstore and they gave me a product called NO-ICK because it was safe for invertebrates. we started using that and the fish just kept getting worse and both died within days.. we kept treating the tank just in case to try and get rid of whatever was in there. there was and still is white spots on the glass that seem to be stuck on there and we were looking close today and there are thousands of smaller white things that are moving along the glass as well as slightly bigger whit spots that are still. is this marine velvet or ich? and if so what would be the easiest and safest way to treat it? the anemone and snails and crabs are still fine, im not even sure if they are even effected by these things like fish are. we don't have any other tanks like a hospital tank or anything yet so removing them from the tank isn't gonna work for us unless its absolutely necessary. please help! thanks for taking your time to read this and for ny answers/advice you can give!