I was just wondering what tempature should my freshwater tank be with 6 neon tetras, 1 male betta, 3 small silver dollars, 1 ghost shrimp and 1 placo( I dont really know what it is but I call it a sucker-fish)? Also what foods would be best for these fish? I have been feeding them some flakes mixed with micro-pellets and occassionally brine shrimp. THANKS.