So my 36g tank was cycled and finished around Christmas. I put in 4 rosy barbs, 4 tigers and 1 albino tiger. Male tiger killed the rest of the tigers, finally took him back to the store, got one more rosy and 5 cherry barbs and a pleco. Cherry's died one by one during that week, pleco made it a month (I got him due to brown algae, so he had food). Then, down to 5 rosys, put in 2 blue gourami's, took 3 weeks for those to die. The only thing surving are the rosy's...They don't seem to be bullying anything (1M/4F). Water: 0 ammonia, and I have the test strips and everything is in the "safe zone"....the water is hard though, use a softening pillow now, seems to help. Now I'm starting to get brown algae again so need algae eater?? I'm afraid of killing more fish but I'd like more than 5 rosys in this good size tank. Any advice? Thanks!