HELP WEAK OVERFLOW ISSUES

[Tig Phish]

So I have 2x 2" PVC overflow based off DIY Joey's design (

). The overflows are way too weak. Compared to everyone's elses overflow I see on youtube I can tell it's way much weaker. The PVC overflow is 2" away from the bottom of the tank. The tank water is 22" tall. The pump is a laguana 2900. Any ideas? Also the weirs I created keeps on slipping up, even though I have suction cups to them.

 

[Tig Phish]

 

[Fish Tank Travis]

Are they not keeping up with the pump? Like, will the tank overflow if you don't turn the pump off?

If the water level is not rising then I would say that it is most likely the pump not flowing enough.

However, if the water level is rising in the tank and you have to turn it off to keep the tank from overflowing, then I think you might have air still trapped in the PVC overflow. It might not be enough to break the siphon, but it could be enough to slow the flow down.

I think you should check the pump first, because it is simple. Just pull the return from the pump out of the water and see what the flow looks like.

If it looks good then I think you should try to reprime the overflows by fully submerging them in the tank and using a high powered pump to force water through them while holding them at different angles, to force the air out. Make sure you then turn them upright while still submerged and put them in place.

 

[Tig Phish]

Are they not keeping up with the pump? Like, will the tank overflow if you don't turn the pump off?

If the water level is not rising then I would say that it is most likely the pump not flowing enough.

However, if the water level is rising in the tank and you have to turn it off to keep the tank from overflowing, then I think you might have air still trapped in the PVC overflow. It might not be enough to break the siphon, but it could be enough to slow the flow down.

I think you should check the pump first, because it is simple. Just pull the return from the pump out of the water and see what the flow looks like.

If it looks good then I think you should try to reprime the overflows by fully submerging them in the tank and using a high powered pump to force water through them while holding them at different angles, to force the air out. Make sure you then turn them upright while still submerged and put them in place.

Thanks Travis, yeah the pump is running the sump dry n will overflow the main tank. So I was thinking the same thing of trap air. At this point im tired, Im just going to drill it. I'm doing 2x 2" bulkheads.

 

[Owens]

I dont really have much to add, the design seems more complicated than it needs to be.

Why not just drill the sides and do a gravity fed overflow like joey did in his arowana tank? This is definitely what I would do if I ad a fiberglass

 

[Tig Phish]

I dont really have much to add, the design seems more complicated than it needs to be.

Why not just drill the sides and do a gravity fed overflow like joey did in his arowana tank? This is definitely what I would do if I ad a fiberglass

Lol why?

1. im a dumbass
2. i was a p for drilling the fiberglass

screw it im drilling

 

[Owens]

Lol why?

1. im a dumbass
2. i was a p for drilling the fiberglass

screw it im drilling

I forget who, but another member on here just got one of these tanks as well and said it drilled perfectly fine with no issues. I wouldn't to be too worried.

 

[Woefulrelic]

This problem persists without using the weir?

 

[Fish Tank Travis]

I think that fiberglass would be much easier then acrylic, and especially glass, to drill.

 

[Tig Phish]

can anyone explain why joey has a Tee for the overflow? I was just thinking of drilling, bulkhead, 90 degree and then straight pipe