Hi all. I found TFP last month and I desperately need help! I’ve read dozens of threads here but am at a loss right now. Sorry this is lengthy.
I bought a new house last winter. It has an awesome pool that was winterized and covered. This May, we opened it to find a dark green pond. I found TFP and within two weeks, we had it blue and clear (thank you all!). Took a while with SLAM, vacuuming, etc but it worked.
Here’s where I’m feeling totally helpless - for the past 4 weeks, it constantly starts turning green every 3-4 days.
I feel like I’m overdoing things to try to prevent this, but it doesn’t matter. By that, I mean: I’m brushing the pool thoroughly 2x a day, running robot cleaner daily, skimming surface 3-4x daily, running filter 24/7, keeping FC at 5-7 (hasn’t dipped below 5 in 3 weeks), testing 2-3x daily (results below). After a shock treatment, it will be good for 2-3 days, then bam, back to turning green. I’m at a loss.
What else do I need to test for? What else do I need to do? Test results below are very similar over the past 3-4 weeks and the same thing keeps happening. I’m using 10% liquid chlorine - haven’t used any algaecides, clarifiers, etc. Filter pressure starts at 12 and hasn’t gone above 14.
Test results yesterday (blue and clear)
TA: 100
pH: 7.4
FC: 7.0
CC: 0-0.5, hard to tell difference
CYA: ~35
Hardness: 180
Test results this afternoon (light green starting, with obvious small patches of algae on floor and walls)
TA: 100
pH: 7.4
FC: 6.0
CC: 0-0.5, hard to tell difference
CYA: ~35
Hardness: 180
Can someone please help me before I turn this thing into a garden or a pickleball court?!?!
Thank you in advance!
Matt