Hello, I'm new to fish keeping and I just bought a new 10 gal. tank at Walmart that included: tank, filter, heater, etc. I started about 17 days ago and have lost 6 fish. I started out with 5 fish and have replaced them as I went along. A couple hav died for reasons I can't explain. 4 Blackskirt Tetras died, all had "nicks" in their bodies close to their heads and were gasping for breath and the last one that died had ragged looking fins and tail. I have also lost a Swordtail and 1 Dwarf Gourami for reasons unknown. I currently have 1 Dwarf Gourami and 1 Gold Gourami in my tank. The Dwarf Gourami has small salt like particles on his pectoral fins and Monday of this week, today is Friday, I bought some Ick med and followed the directions on the bottle. I removed the filter and left the filter pump running and added the appropriate dose the tank. That's when I lost all the Tetras. The Gold Gourami eats fair and is fairly active but the one with ick, the Dwarf Gourami, lies on his side on the bottom of the tank, doesn't eat, every now and then swims to the top and then back to the bottom again, has glassy eyes and his color has faded somewhat. It's been 5 days of treatment. I have performed 20% partial H2O changes 3 times this week and now am doing this everyday since I read a message on this forum indicating to do this. I aslo vacum the gravel during the H2O changes. Should I keep giving the ick med until the spots have dissappeared, or should I stop and replace the filter tommorrow? I'm afraid I going to lose my last 2 fish before my H2O has cycled. I measured the Ammonia level Thurs, it was <1. pH was 7.6. i can't get the pH down no matter how much "pH down" I add, so I quit trying. Someone please help me. I really am ignorant about this hobby but I am determined and willing to learn.