I re-did the aquascaping when I added some new rock. I'm guessing that there's about 175-180 lbs. in there. I really wanted to have three separate islands (right, middle and left), with some caves connecting them. But, I also wanted to have room up front for the bigger fish to swim. Don't know if I happy with what I ended up with.
I know the pics are not the best. It probably looks better in person. Anyway, what do ya' think?