Is this how it would go...Please Verify

[Daddyrawg]

I want to accomplish a water change from my Sump.

Would it go like this?

1. Turn return pump off ( and protein skimmer off if on)
2. watch sump water level rise.
3. remove water from sump
4. Add new water
5. Turn return pump back on and everything operates normally?

** When I turn return pump back on step #5, I dont have to wory about syphoning overflow box like I did when I first introduced water to the tank right?

Just plug and play ?

 

[sde1500]

I think that depends on what you mean by the overflow box. You use a Hang on Back overflow? Eshopps like I use won't lose siphon. I can't speak to one that needs a pump to work. But basically yes.

 

[mcgyvr]

yes and if you have a HOB overflow then you "hope" is hasn't lost its siphon and watch it to ensure it hasn't during startup hand on the plug just ready to stop the pump if needed..

If a non-hang on overflow thats not needed..

Even with a HOB though if you did it properly the return pump section should run dry BEFORE anything overflows...
"Dry" meaning there isn't enough water in there and the pump starts sucking air and doesn't pump anymore water up into the display tank..

 

[Daddyrawg]

I think that depends on what you mean by the overflow box. You use a Hang on Back overflow? Eshopps like I use won't lose siphon. I can't speak to one that needs a pump to work. But basically yes.

This is the overflow I have..

 

[oldhead]

Looks like the one with the pump. I use the eshopps and it doesn't lose siphon. I also have auto top off switches as back up. One at the top of the tank and another in the return pump section to shut things down if it ever happens to stop siphoning.
To answer your question; it should work as you described.

 

[AnnaCassandra]

I don't have a HOB overflow, but to make water changes a little easier, I siphon water from the DT as I pump it in to the overflow side (not the return side) of my sump. I know that there might be some mixing of new water with old getting siphoned out but I figure by taking from the display and pumping into the sump the amount of new water being sucked back out is small and this keeps me from having to deal with shutting pumps and skimmers off while I do a water change, I find it helps limit the spillage as well.

 

[mcgyvr]

This is the overflow I have..

Loss of siphon is always a potential problem with those.. always..
It doesn't matter the brand.. The "potential" is always there..
Some brands though have less of a chance due to minor design changes but the chance/potential is always there whenever you NEED to rely on a siphon to bring water up and over..
So while 99% of the time it will be fine.. With a HOB there is always a chance..

You do not have that with a drilled tank..

 

[Daddyrawg]

Thanks Mac

 

[LeJeune981]

I don't have a HOB overflow, but to make water changes a little easier, I siphon water from the DT as I pump it in to the overflow side (not the return side) of my sump. I know that there might be some mixing of new water with old getting siphoned out but I figure by taking from the display and pumping into the sump the amount of new water being sucked back out is small and this keeps me from having to deal with shutting pumps and skimmers off while I do a water change, I find it helps limit the spillage as well.

I do the same

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