sirfishmaster
Aquarium Advice Freak
does 3" depth make a difference with lighting? i am thinking of switching from my 55 gallon to a 40 gallon (& sump) the 55 is 21" high where as the 40 has same foot print is only 18" high.
2. how many pounds of rock will displace 1 gallon of water?
doug
2. how many pounds of rock will displace 1 gallon of water?
doug