ok, 125 with few piece of DW and some small rock formations for crawfish. ok it will be 4 big sponge filters and a wave maker for filtration. do yall do heaters. my goldfish tank in dead winter it was 62. degrees now with the descent hot weather it is 65, so i assume with summer the temp will go up. So with the rising temps and the dead cold of still 62. I wont need a heater will I. also is 8 sunfish/bluegill a good amount.