my tank is a 29 gal i have 3 mossies in it and they are all full grown 2 yr olds and i was going to add lava rock but i have no $$ right now
ps: what is a sump i have never heard of this
sump mean a sump tank ...it a tank below my frog tank which my frog tank's water will flow down to it and the sump tank help in store a bigger vol of water and also i can also have my carbon and other filter item in it....