If I may ask, how well do the pea puffers get along in the community?
So far I haven't seen any nipped fins, or chasing going on. The larger fish seem to leave the puffer alone, and the puffer seems to spend all his/her time hunting snails between the rocks.
How are the shrimp doing in there?
The ones in the sump are still OK, the upper tank ones are all gone. Someone figured out they were food and every single one disappeared over night from the main tank. I may try to establish them again, I may not.
It's possible some of the tiny ones in the sump will get redistributed to the upper tank, but now that the fish think of them as food I don't think I'll get a colony back up top any more.
Do the GBRs and Gourami fight anyone?
They've both been very docile. The Gourami likes to just sit below the floating plants and chill most of the time. One of the more mellow Gourami's I've seen.
By the way, where'd you get your river rocks?
I bought some from Home Depot and mine weren't inert (they raised pH).
I also got mine from home depot. Both sets didn't react to the acid drop test, and the PH in the tank has been pretty consistent at ~ 6.8 - 7.2.