So I have a 10 gal. tank and a power filter for it. I had guppies, neon tetras, and red barbs and all have perished due to getting stuck on the filter intake. I just got an undergravel filter before researching it and I've only heard bad stuff about them. I now have 2 dwarf gouramis, 2 red barbs, and a good size sucker fish. I'd like to get more guppies and switch to an undergravel filter, but I have no idea if I should. Anyone have some advise?