Hello, I built this around a 150 gallon wide tank about 6 years ago. I silicon-ed 3 10 gallon tanks inside of it on the back inside. Those are the "land" portion for planting, Foamed into the back wall different huts and planters. The front portion of the aquarium with the glass painted is about 7 inches in dept and the width of the unit (76 inches) and the height of the 10 gallon tanks (12 inches) is full of water. The 7 inch width of water is covered by a 1x8 pvc board from Lowe's. the two 4 inch caps hold 4 inch pvc thin wall canisters half filled with gravel so that a 1 quart Kerr jar sets inside for a ff feeder. I change out the ff jar with a plastic lid with vents and 1 , 1/4 inch hole for the ff to exit with a few holes in the cap to exit. This uses all of the space in the 150 gallon and circulates a drip system in from the top. I have vents with fans and a feeder hole at the top left and right side that funnels treated flies to the bottom area (they fall on the top of foamed in huts) Just replanted trying to find a heard of Highland Bronze to put in there. I have 4 tads coming tomorrow but still looking for about 4 more juvies to add to it. It is about 500 gallons including the water uhat is hidden and about 275 gallons of usable frog space. Hollar if you have any Highland Bronze for sale. Thanks
Onemetalknee