Ok so after some 3 posts about trying to figure out what im going to do about my sump situation I have figured it out, and I want to make sure it will work. I'm going to use two 10gal glass aquariums connected via pvc
pipe as my sump. Im going to have to drill a hole in each tank, then run maybe 6 inches of pvc
to connect. Im pretty sure i have a 800gph overflow currently. Im going to have that flowing into one 10g with my skimmer in it. Then i plan on drilling a hole near the top of the tank, and running it into the other tank with my return pump. How big should the holes be so ill have enough water flow between the two tanks so the tank wont overflow.