Repairing the holey hdpe, to be free standing, after the hot glue failed to bond securely. They are now bolted. I only have 3.5" to squeze things into the middle tank.
I removed, the pvc pipe, as it was a eye sore, but useful on the sort term to having 14 males to 3 females. The other males moved into the log tank.
This was a old school, high tech. Undergravel poly floss bio media, I use the floss in my mechanical filter.
Basicly I fused about 3 pounds of sand to it, so greens can take root, on a moss wall. With a built in sand water fall, airlifted. Thanks to whom posted the idea a while back.