Themonsterisme
Aquarium Advice Freak
I have photobucket but I'm not sure how to upload to here from there
I have photobucket but I'm not sure how to upload to here from there
+1. def not enough drainage flow for your tank.That is not much for a 210. a single 1" drain is what I'm seeing. I had four 1.5" drains on my 300. I would use both of those bulkheads for drains and go over the top for return.
If there is no bulkhead in the smaller hole, you need to find one to put in it. there is no way a hole in glass will not leak without one.
why not run the larger hole at full syphon, then run either a durso or stockman (think that's the name) on the other? I got tired of the constant noise from my dursos so that's what I did.