Found the tanks first victim today.
the overflow has been backed up for 2 days, but i have had a very busy day including traveling around the countryside for job interviews. Basicaly i saw it was plugged up, assumed a snail was in it or something and just throttled the pump back so more drains into the sump.
today i went to modify the returns, as i allready planed to do and found my lawnmower blenny jammed in the return pipe, the plumbing previously had had a small rigid pipe into it for venting. My lmb had gotten into the overflow then sucked into the hole and stuck on the vent tubing so he could not swim out or get dumped into the sump.
Now both tanks have durso style vents so if anyone falls in they will get sucked straight to the sump. the other advantage to this is now the main tank's return has no problem taking the full GPH of the return pump. It will never have to do this as some is going to the second tank and a small amount returning to the sump. I did run it at full speed for about 15 mins and the water would not even rise an inch over the overflow.
The gf is sad that was her favorite fish. was one of my favorite too.
no more fish untill i get some kind of grating on the overflow though.
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