I currently have a cycled 125l tank setup with Dwarf Neon Rainbows and Honey Gourami. I want to add some bottom feeders at the end of the week and initially had planned on getting Dwarf Chain Loaches. Only problem is that they are quite expensive and my water hardness is at their upper end. Plus I have read that they can pick up diseases pretty easily due to their lack of scales. This got me thinking about other possibilities but I've hit a bit of a block. I had thought about some Corys but I have gravel in the tank rather than sand. I was told at my LFS that the gravel I bought there is OK for them but I'm not so sure. It's the small black slightly sparkly stuff you get in a lot of shops. can anyone suggest what I could add instead?