I’m not planning on changing anything, as my tank parameters seem to be great. I did a 3 gallon change which is my weekly regimen, but that’s it. I also have a handful of shrimp food from Shrimp king( sampler pack which has Mineral, Leaf, Snow Pops, Complete, and one other one I can’t recall). The shrimp don’t seem all too interested in them, and in such a large tank, they seem to be content with biofilm for now. I just hope this mama holds on to drop her shrimplettes.... hopefully the yield is decent and I can get the population back up. I’m down to 6-7 Crystals.