Thomas W. That is an absolutely ingenious way to house a fiddler crab. Spectacular!
As much as I would love to take the credit for it they are made by Atlantis underwater islands and it like a diving bell supplied with air from my pump to keep a fresh supply and the crabs can come and go when they feel the need. I have RCC and Fiddlers in my tank and they all use it and it seems to keep them from climbing out of the tank for air. as soon as I get home from work in a week or so I will post some new pics with the new fish and some major growth with my sat+
I have a 90 gal bow that is strictly rockscape. I want to grow algae that covers the rocks. It is 24" deep. Would the satellite+ give off enough light at that depth to grow the algae. Love the lighting effects on it.