Gurgling/flow help

[atcaw94]

I have a 58gal with 30 gal sump. The overflow box has a durso standpipe 1 1/4" with a 3/4 or 1" return with an Eheim 900gph pump. I can only open the pump up about 1/2 way without getting the gurgling sound. I currently have the pump wide open and have drilled numerous holes in the top of the durso. The water level doesn't rise and fall like it did before I drilled the holes, but the return in the sump gurgles/surges like it's blowing air. Should I just keep drilling holes until it stops? I would think I need all the flow I can get with SPS.
Thanks

 

[eric b]

Where are you drilling the holes??? All durso's I have seen and used need one hole in top with a piece of airline tubing and you raise and lower tubing until silent....As far as drain line in sump could be the way you have it plumbed can't say with out a pic or actually looking at it.

You actually want flow in the tank for the sps from either a type of powerhead or a closed loop not from just your return pump. You want your flow through the sump to be slower and not used for flow in tank.

 

[rolo65]

Go get another cap for the durso....If you have a step drill bit just use it to make the hole bigger until it stops...or if you have a good set of small drill bits.....if you have had this set up for a while.....salt will sometimes clog up initial hole and cause the gurgling/rise and fall.....but yeah just get another cap and start small and work you way up till ya get it....that's what I did.....and just take the cap off every once in a while and clean out the air hole....But like Eric said.....you do only need one hole....

 

[atcaw94]

Eric B;485952 wrote: Where are you drilling the holes??? All durso's I have seen and used need one hole in top with a piece of airline tubing and you raise and lower tubing until silent....As far as drain line in sump could be the way you have it plumbed can't say with out a pic or actually looking at it.

You actually want flow in the tank for the sps from either a type of powerhead or a closed loop not from just your return pump. You want your flow through the sump to be slower and not used for flow in tank.

I'd rather not do powerheads, how can I do a closed loop utilizing the setup I have? I searched the internet but didn't find much for an already drilled tank.

 

[eric b]

There are many ways and different ideas/designs but the way they work is suck in water from main tank and return to many different points in the tank (Hints the name closed loop). Instead of drilling holes in your tank you can also make system go over back of tank. It would require a separate pump (all closed loops require a separate pump) to operate it is all your choice because everyone has there opinions between closed loop and power heads (which is cheaper). I prefer a closed loop because I don't like the sight of powerheads in the tank.

It might be knida hard to set up since your tank is already up and going but it is doable if you go over the back of the tank with all lines that way no drilling is necessary.

 

[atcaw94]

Eric B;485952 wrote: Where are you drilling the holes??? All durso's I have seen and used need one hole in top with a piece of airline tubing and you raise and lower tubing until silent....As far as drain line in sump could be the way you have it plumbed can't say with out a pic or actually looking at it.

You actually want flow in the tank for the sps from either a type of powerhead or a closed loop not from just your return pump. You want your flow through the sump to be slower and not used for flow in tank.

For the drain line, I have PVC pipe running into the sump with an elbow at the end,if that helps any

 

[eric b]

Is the elbow pointing down or across and do you even need it on there. I think once you get the top correct (durso) the bottom won't be as noisy but will always have some sound.

That is why I am putting my sump in basement....

 

[eric b]

atcaw94 shoot me a pm and will send you my number can probably explain a lot more in a phone call or either come by and check out the tank and see what is making all the noise.