Hello I'm new! I am currently setting up my 55 gal, with a Eheim 90 gal Classic Canister filter, and Carbisea Sand substrate for my Brackish fish who are looking a bit too big for my taller 40 gal. There is a tower of terracotta pots, tons of plastic/silk plants, a submerged cave made large enough for the goby(the cave is hidden in the sand), and soon to be PVC piping logs. The SG is 1.005 and I am wanting to add a Dragon Goby (Dragon Eel, Violet Goby, Dragonfish etcetera). I am getting a lot controversy if this tank size is adequate enough for a full grown. I also want to know if they would be OK with bumblebee gobies or if they would end up accidently swallowing them.