Good morning! I just replanted the babies' nursery tank with new plants and put in better caves. They both love to climb so I had to come up with safe (fall-off-proof) caves (still trying to figure out how to make a little "balcony fencing" to stay put, but I'll get it figured out just like everything else. The new plants will hopefully take the heat and high humidity, the amt. of light that they get in bright and darker areas of the tank. I have coco coir mixed with little organic soil, reptibark on the bottom and top layer is moss. There,s bunch of earthworms in there who've been living there for about 3 months, and all I could find was just 5 young pill bugs. For some reason this year they are almost all gone from my garden unlike previous years and I don't use any chemistry calls. There are TONS of snails though! Never seen that many empty shekels in my flower beds. My question is, how often do you guys replace the bioactive substrate, or do you? Ever? It doesn't seem to smell and I spot clean daily. It's been there for almost 4 months and so far looks like a gorgeous media for plants to grow and go crazy. Any advise?