Well, if you empty all water after removing frogs, I'd rinse the bottom with hot water (no soap or bleach) then wipe it dry before replacing water. That is what I do with my aquarium plus everything you mentioned. I rinse my decorations also. Good idea to have a filtration system in your tank. I clean mine once a week (only 10 gal with 4 FB's) and I remove everything and rinse it. I love putting it back together! I have driftwood, treehouse, live and fake soft plants, pebbles and eco earth fiber substrate in flat round shallow dish, smooth rocks, terra cotta pot for hiding. Mine also crawl under dish and hide. I wanted a cave but can't find what I am looking for in our stores. I also can't find live moss anywhere. Hope this helps.