I was going for whatever i could that would naturally buffer the Ph. So its limestone rocks, and when i was at the landscape place thay had the pipes so i though thay would help make some caves. I also got a bag of limestone chip for my gravel. I was gonna get limestone sand but i thought it would probably cloud the water too much.
I have 3 auratus, 3 kenyis and 3 kadangos. And im getting some zebras tonight.