I've yet to see how overflows are plumbed and have a couple of questions.
If you want to do the quiet (Herbie?) approach, how many holes do you need drilled in each overflow? I know there are two required for the main and safety lines supplying the sump, but I don't understand how water is returned to the aquarium. Is there a third hole inside the overflow for the return?
When you have canisters, how is the water sourced to and returned from them? I'm guessing you cannot use the overflow to source the canister. I saw at a LFS that they have additional holes in the bottom of the aquarium that they place a short riser tube with a strainer to source the canister. I did not pay attention to how the water was returned. I'm guessing it is a good idea to pull water from the bottom of the aquarium to send to the canisters.
Thanks in advance for any insight.
If you want to do the quiet (Herbie?) approach, how many holes do you need drilled in each overflow? I know there are two required for the main and safety lines supplying the sump, but I don't understand how water is returned to the aquarium. Is there a third hole inside the overflow for the return?
When you have canisters, how is the water sourced to and returned from them? I'm guessing you cannot use the overflow to source the canister. I saw at a LFS that they have additional holes in the bottom of the aquarium that they place a short riser tube with a strainer to source the canister. I did not pay attention to how the water was returned. I'm guessing it is a good idea to pull water from the bottom of the aquarium to send to the canisters.
Thanks in advance for any insight.