I'm with Lance on this one. I probably only have about 100lbs of rock with about 340 gallons of water volume. That's about 0.3 lbs per gallon... hmmm, I must not have enough filtration. And I have over 30 fish and tons of coral. Oops.

i have like 200 lbs for my 150 gallon tank and i hate it. going to redo the tank once i have time

I use about 40 lbs or so in a 75 gallons but it work great because it's the totoka liverock and it is extremely porous. Not only that but the total amout of surface a small piece of Totoka give is equivalent to a much heavier and larger piece of regular liverock. Because Totoka liverock has a lot of branching, it has a lot more amount of useful surface area.

So I guessed the 40 lbs of Totoka was probably equivalent to 80 lbs of heavy rock shaped liverock with very little surface. Worked great for me as my nitrates are undetectible and the rock seem to be doing a good job at filtration and denitrification.

It's not the quantity that really matter but the quality of the rock you put in there I think.

:lol: totally agree on that one :lol:

I probably have about a pound per gallon but thats just because I added till I had what I wanted to see