Compartment sizes and baffles sizes.The baffles will need to be cutto the inside width of the tank. Measure the space and dont cut them too long, or you'll have crooked baffles. A little shorter but not much shorter is best. Within 1/16th if possible. Placement and actual compartment sizes will not be exact, you'll need to ad-lib as you go.
First baffles=5.5LX9WX14H
Heater compartment =20LX14Hx3W
Fuge compartment= 9WX14.5LX14H Approximatly
Pump compart/including baffles on both sides= 10.5LX12WX10H
Rubble compartment=6LX12WX10H
Skimmer =11.5LX12WX10H(or whatever is left, no smaller than 9X12 though.)
Fudge the rubble compartment if need be, Baffles are set at 1.5 in apart, with raised baffles at 2In up. Except the sponge baffle, set that to match your sponges thickness.So it fits a little tight.First baffle on the fuge side, after the drain from tank, set it at 2.5 in. Or you can go wider if you want, just take from the fuge compartment if you do. 2.5in will be tight for getting your hand into if need be. But shouldnt have much need to later.
Baffle hieght. From right to left, heater divider first.
1. 20"LX15H
2.9LX14H
3.9X14
4.9LX6H AND>>>9LX8H (Top)
5 12LX14H
6. 12X14
7. 12X6
8.12X6
9. 12LX10H
10. 12LX10H
Backwash was calculated at 11.23 gallons. Sump/ fuge will allow approximatly17 -18 gal.of backwash.
You can install a baffle in the skimmer section to help with microbubbles which might influence the skimmers performance. Between the drain and the skimmer. If so just make it a 10X12 baffle. You can use a filter sock also, or try a "T" in the drain line, with the open end facing away from the skimmer.