I ended up picking up some real bulkheads at my local plumbing supply shop. I will post a picture of them later the sales guy told me not to use a sealant with them. I might have to look into some structural support for the tots. Mine are half the height of yours so they might be ok. I have one cycling with just water to test everything out no leaks so far. I am planing on putting trim on everything at some point but holding off for now to use the cash on other supplies.

Your setup looks good is the fish tank just a sump tank?


link to the bulkhead I am using.
http://www.fleetfarm.com/detail/norwesc ... nAodrD8ACA