OCLT good…but algae still in pool

[YippeeSkippy]

You can maybe test that idea by turning the bowls and spa spillover off for a day and see if you pass OCLT.

 

[300winmag]

Measured FC again. 3 times. Final is 26.5ppm.

The bowls are on a simple circuit; floor drains in pool, pump, bowls. So When the bowls do not flow, the water level drops as the water backflows to the pump. Maybe an inch sits in the bowls.

Ive been running them full time for the SLAM until today.
Typically they run for 2 hours in the AM and 2 in the afternoon.

 

[PoolStored]

Final is 26.5ppm

Let's see what the morning brings.

 

[300winmag]

Elaborating on the fountain circuit.

That pump also feeds these fountains. I can shut of all flow to the bowls and direct it to these and one return in the pool. The fountains shown would grow in water column height, but no water would go to the bowls.

 

[ajw22]

Maybe an inch sits in the bowls.

That inch of water is a perfect algae breeding ground thst gets dumped into the pool when the water starts flowing.

 

[ajw22]

You can maybe test that idea by turning the bowls and spa spillover off for a day and see if you pass OCLT.

Better to run the bowls continuously during daylight.

 

[300winmag]

If it turns out to be the bowls causing the algae, id much rather never run them (valves closed). They are loud and the 2nd pump running 12hrs a day would be less than ideal.

pump back on…fc in 30min. Raining. Rained a lot overnight….

 

[300winmag]

0624. 40 drops, FC 20.
Rain added about 1.25” to the pool, so some loss is dilution.

Will run today with no bowls. Its also going to rain all day

 

[300winmag]

If the bowls are algae factories, does this mean that the spa overflow has to run full time during sunlight?

 

[ajw22]

If the bowls are algae factories, does this mean that the spa overflow has to run full time during sunlight?

No. Run the spa overflow for 20 minutes twice a day in the morning and early afternoon to keep it chlorinated.

 

[300winmag]

No. Run the spa overflow for 20 minutes twice a day in the morning and early afternoon to keep it chlorinated.

Cool. I run it for an hour in the morning and another hour in the afternoon.

 

[300winmag]

Would this setup prevent the bowl algae?
Added the extra 90 to keep more light out



the long piece is sloped down to pool.

 

[ajw22]

If water pools on the bowl when the pump is off it can breed algae.

 

[300winmag]

It would not pool/collect in the bowls. Horizontal run would go into the pool and the rest would back flow down the supply line.

I’d also put a lexan cover on the bowl so rain / leaves etc couldnt collect in it

 

[300winmag]

No fountains or spa overflow for over a day.

Pool still has dusty debris that settles on walls & floor.

25 may
7:50pm. 50drops. 25ppm

26 may
0602. 44 drops. 22ppm.
9:13am. 43 drops. 21.5ppm.

 

[300winmag]

11:14am. 45 drops. 22.5 ppm
1:05pm. 39 drops. 19.5ppm. +30oz

Also plumbed the bowls such that they no longer accumulate water.

 

[300winmag]

Maybe related, maybe not?

Went out and found a bunch of these dudes floating in the pool. Scooped them out and killed them.

 

[300winmag]

 

[ajw22]

Maybe related, maybe not?

Went out and found a bunch of these dudes floating in the pool. Scooped them out and killed them.

View attachment 650123

They are a rounding error in your FC loss.

 

[300winmag]

3:25pm. 40 drops. 20ppm.