I have (2) 22 gallon acrylic tanks for sale $5 each. They don't leak but they have been around for awhile so that have quite a few scratches and such. Not really good for display tanks but would make great hospital, breeding, or frag tanks. Each is drilled in the back with a 1/2" and 1" bulkhead installed.
Also have a bunch of Hi-Rocks LR. The stuff is pretty dense and not very porous but it works OK as base rock or in a fuge. I don't have any way to weight and being denser than typical LR it wouldn't be a great measure anyways. $10 takes the whole pile.
All items are pickup only in Reading or Jackson, MI ( work there ). I'll also be at MASM meeting on Sunday Dec 4th and can deliver there as well.