Algae in Pipes?

[Knucklehead]

I've performed the SLAM process a couple times and I am in the midst of one more. I've been fighting green algae that I don't seem to be able to get rid of. It sits as a cloud on the bottom of the pool. Probably not a cloud, but loosely on the bottom of the pool. If I brush it lightly, it comes up in a cloud. I measured my CYA and it is 30. I had previously measured it at 50, but I was stopping when the black dot was still slightly visible, not gone. I mistakenly measured the chart and have had elevated chlorine between 10 and 15. I jacked it up to 20.5 yesterday, it dropped to 18.5 overnight and I added a couple bottles of chlorine. I know that is a bit overkill, but I want this gone.

Here is my dilemma. I'll keep following the SLAM protocol and measure morning and evening, keeping it at around 20. When I turn my pump on it kicks into prime mode now and again. When it does it spews a cloud of green from the inlet valves. We have opened the Sand Filter and the filter is clean and beautiful, not a trace of algae. The only thing I can think of is the inlet pipes. This has been a long term problem. Just varying degrees of green. Well, not totally true, when the pool is clean of algae and there isn't a trace, there is no green cloud. Should I clean my inlet pipes with a wire brush of some sort? Or just proceed with the SLAM and let it resolve on its own.

 

[mknauss]

You need to complete the SLAM. Twice a day testing and dosing tends to make a SLAM last a long time. If you can increase that to 4 times per day, your SLAM will go quicker.

Your chlorinated water runs through the pipes. So any algae in them should be eradicated.

Sand filters take a longer time to clear a pool at the end of the SLAM. Once you pass the Overnight Chlorine Loss Test, go to Pool School and learn about adding DE to your sand filter.

Take care.

 

[AftonJeeper]

Keep the pump running 24/7 during the slam.

 

[Knucklehead]

You need to complete the SLAM. Twice a day testing and dosing tends to make a SLAM last a long time. If you can increase that to 4 times per day, your SLAM will go quicker.

Your chlorinated water runs through the pipes. So any algae in them should be eradicated.

Sand filters take a longer time to clear a pool at the end of the SLAM. Once you pass the Overnight Chlorine Loss Test, go to Pool School and learn about adding DE to your sand filter.

Take care.

I did see the posts about DE, should I do that now?

 

[mknauss]

Once you pass the Overnight Chlorine Loss Test. At that point you have mostly eradicated the algae and are primarily in a filtering mode.

Take care.