Water Pump failure

[nastro]

I am running a sump tank setup can I check is there a way to stop the water from flowing back into the sump tank in the event of a power failure. Because of water pressure from higher ground to lower ground the water will be generated back to the sump tank (water pump working in reversed direction). Anyway to prevent this from happening? Also I am running an extra smaller canister with the inlet in the sump and outlet in the main tank connecting to a rain bar slightly below water level to prevent water agitation however when i off the power the water will also flow in reverse direction will this cause any damage to the canister alos any way to prevent it?

[eviltrain]

why not attach a rainbar on the outlet of the water pump instead?

move the rain bar above water surface.

as for your canister, just put the inlet and outlet in the sump.

[nastro]

Oh hmmm thats right attach rain bar on water pump improve the circulation at the same time.
I ran the canister outlet with the same intend improve water circulation to the main tank it seems that i am giving myself headaches.

[nastro]

Also moving the rainbar above water surface will that contribute to surface agitation since i am running on sump with CO2 canister

[Shadow]

how is your water flow from main tank into the sump tank? normally it will be overflow system. Thus if power failure water from main tank will not flow to the sump tank.

You can add wavemaker to improve water circulation in your main tank.

[eviltrain]

Also moving the rainbar above water surface will that contribute to surface agitation since i am running on sump with CO2 canister

for this case, you put the inlet and outlet for the canister in the main tank itself, move your CO2 system to the canister system will do the job.

your sump will act as your main filtration then.

BUT, your next problem may be loss of CO2

i tell you what, follow the above and as for the rain bar for the sump, just put it 1 cm below the water surface. this way the most water you gets back flow into the sump will be minimum.