Hi there, i am new to this forum and i have a couple of questions. i've had my tank for about 5 months now. throughout those five months i've been through i've had to replace 5 fish and two algae eaters. starting i had a silver dollar, a marble angelfish, and 3 platys in a 10 gallon tank maybe that was too much, but since then all the platys have died, the tank started to get dirty so i put in a albino algae eater, and he also died, after i also put in a different algae eater the small black kind but he also died. the only ones that have survived is the silver dollar and the angelfish. about two months ago i added 4 small danio's with those two, the lady said it would be okay. since then. 2 of the danio's have done a diasppearing act. i cant find them anywhere. they are not at the bottom of the tank dead, they are not in the filter, and i was just wondering if the silver dollar or the angelfish could have eaten them cause they are nowhere to be found. also over the 5 months the silver dollar seems to be getting a little more aggressive than usual could it be him. please help! :help: