kribensis12
I know where you live
I tried it once, and it didn't work . I sold the R/O Unit to Tolak afterwards. I cant afford one right now anyways.
/en.wikipedia.org/wiki/Shell_dweller

what about Pseudocrenilabrus multicolour<Egyptian Mouthbrooders .....great little fish and they breed in 8.5 as my ph is around there aswell
or your just very particular 