Hi George. Watched all your stuff and it’s super helpful and informative - thanks for your efforts. Do you have experience using sumps; are they worth it? I have a 22l nano and a TMC Sig 600, with a 350 juwel for later! I wanted to incr. water vol and hide all the kit too. I hadn’t planned for top ups or drilling tanks at that time but I’m now starting to... just wondered what your thoughts were. Thanks!