Properly plumbed a bulkhead can become a siphon. This side is plumbed to recirc and the other is to drain. The recirc overflow to drain. To drain the Tai. simple remove the screen plug in a drain pipe and it will automatically drain to 1 inch or more if desired. #goldfish #goldfishpond #goldfishunion #goldfishkeeper #goldfishunion #goldfishkeeper #goldfishgarage #goldfishbreeder #builditbetter #diyfish #aquaculture #goldfishlover #goldfishjunkie #goldfishtank #goldfishes #goldfishcommunity #goldfishinstagram #aquaculturist #recirculatingaquaculture

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