The 125g and both the 75's are almost full. Water should be flowing to the 40 gallon by tomorrow night and the return pump will likely be able to be turned on Thursday night.
Overflow is on the left. May paint it the same color as background but will wait until the rock goes in to see how much is visible. The return line is on right but only a 1/4" under water so not visible unless you look real close.
This is the plumbing under the stand that runs down to the basement tanks.
The upper left hand corner is where the plumbing comes in and returns. The 75 on the left side has the rock for the display. Although it is plumbed into the system I have the valve closed to keep isolated until it cycles. The bottom 40g tank takes feed from both 75's so either once can be isolated if need be. It will house the protein skimmer, heaters, probes and dosing drip lines. Obviously I don't use the exercise equipment