Existing Pumps are Overpumping

[Confused]

I have about a 165 gal saltwater tank for about 2-1/2 years now.
I have the two original submerged pumps in a sumptank.
Today the pumps decided to overpump and drain the sump and begin slurping.

I have the tank designed with anti-siphon holes in the event of a power loss it doesn't flood the house.

I have never had any troubles with over pump flow. If anything I had issues with under pump flow.

Right now both pumps are off.

They are not adjustable flow pumps but constant flow type pumps.

My guess is that the flow from the tank to the sump are being clogged by something. I plan on purchasing a snake tomorrow to hopefully unclog my plumbing issue.

Could the pumps be bad? I would think that pumps would get weaker when they fail and not get stronger. ???

 

[bmoraski]

Hopefully your guess will be correct. a much easier fix than replacing pumps.
in my experience when pumps go bad or are slowly going bad they pump LESS.
Now my experience is NOT with aquarium pumps so i cant say your pumps are fine. Ive been a waste water treatment operator for 10 years, and i deal with all shapes and sizes of pumps and when pumps are dying they pump less.
im sure someone here will reply with similar setup as you, and can give better advice. please post if snaking out fixes the problem
good luck

 

[Lotus]

It does sound like the line from the tank to the sump is clogged. Sometimes snails or debris gets in there, and can cause a problem.