Wonderfully clean and bright. Well done.
I have had the shells in my tank ever since I got it, so I think that my fish are used to the hard water now. I have had my tank for 10 months, and only one neon, and two guppies have died, and the neon died from an unknown parasite. I probably wouldn't have put the shells in my tank now, but I've like them and they don't seem to be causing any problems.Those shells will release calcium into the water, and raise the Ph. I would take them out, they may end up killing your fish.
Other then that, it looks nice!
I'm going to keep a few, and I am going to give away the rest. Also their mom is pregnant againclaen thats what we like. what are going to do with the fry? raise them or give them away