Failed OCLT. I am going to clean pump basket, cartridge filter, scrub the inside of the skimmer and door (although looks clean), and look into the pool light. Will continue SLAM.
Losing Free Chlorine
- Thread starter surferboricua
- Start date
Filter was full of filth to say the least. Cleaned it plus scrubbed skimmer inside and door.
My pool light is a Pentair Globrite. Should I try and remove it? Think I read somewhere on this forum the way Globrite are made shouldnt have algae form in it. Can anyone confirm?
- Jun 22, 2014
- 47,995
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
No need to remove that type of (small LED) light. Just continue with the brushing, vacuuming if needed, and inspecting any other areas that might hide algae. If you have a main drain, you might remove the cover and take a look underneath. No hollow ladders or steps I hope? If you're getting hit by the FL storms and have significant overflow, your CYA might fall a bit which would be welcomed in your situation. Just something to watch.
Have steps, and waterfall. Brushed waterfall and steps. Might have to check main drains if issue persists.
It seems like I keep losing anywhere from 1 to 2 ppm per hour. Water is crystal clear, there's two places I am being suspicious about vacuum port, and main drains. I haven't been testing CC, probably something I should be.
- Jun 22, 2014
- 47,995
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Hard to know if that's because of algae or also in-part that you are at SLAM level. When we are at SLAM level, there is a higher FC-to-CYA ration, so the extra FC tends to burn-off just a bit faster than normal. You are right to be suspicious. Any area that holds water can hide algae.
I began diluting my FC testing to 5ml and 1 drop per ppm. I will do regular testing of 10ml for OCLT. All to conserve some reagent.
Failed OCLT. Did the test twice with 10ml sample, no dilution. However, test 1 came out as 29.5 FC and test 2 gave me 31 FC with .5 CC. What do you guys make of this?
I have time today, so I plan to get in the water and see if I can take the main drains covers off, see if theres anything in there hidden.
I have time today, so I plan to get in the water and see if I can take the main drains covers off, see if theres anything in there hidden.
- Jun 22, 2014
- 47,995
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Was that done with the 5 ML water sample size? I recall you saying you were low on reagent.
No, it was done with 10ml. I read on another thread I could dilute to 5ml, but make sure to use 10ml for OCLT. So last night test was 10ml and so was the two this morning.
- Jun 22, 2014
- 47,995
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
I'm thinking you are in good shape. An error of 0.5 is not much at all at such a high FC level. Since your OCLT was performed at such a high elevated level, we know the potential for error increases either from test variation error or the changes between FC and CYA at higher levels.
I would recommend allowing the FC to fall to about 10-15 ppm. Shouldn't take but a day or two. Consider running another OCLT at that FC range. It might provide better stability and accuracy. If you pass you'll have the peace of mind to know you are algae free. If you fail the OCLT at that FC of 10-15, then you know you still have some work to do.
I would recommend allowing the FC to fall to about 10-15 ppm. Shouldn't take but a day or two. Consider running another OCLT at that FC range. It might provide better stability and accuracy. If you pass you'll have the peace of mind to know you are algae free. If you fail the OCLT at that FC of 10-15, then you know you still have some work to do.
Great suggestion. I will do that and perform another OCLT. Thanks!
Took a reading now at night and am at 24 FC, havent added any LC today except for early morning before Texas Splash suggestion. Letting FC drift down to 11-15 FC to then OCLT see if SLAM was a success, as suggested.
Success! OCLT Passed, CC at 0.5 and crystal clear water! Took a bit more than expected for FC to come down to below 15 levels, so forgive I didn't post an update earlier. I greatly appreciate the help you guys provided in this SLAM journey.
My personal takeaway, when SLAMming get CYA down lower if possible to avoid having to do so at much higher FC levels. Testing at higher FC levels, results can be not as accurate. If SLAMMing at higher CYA/FC levels, might have to allow FC to come down to levels of around 10-15 to do final OCLT.
My personal takeaway, when SLAMming get CYA down lower if possible to avoid having to do so at much higher FC levels. Testing at higher FC levels, results can be not as accurate. If SLAMMing at higher CYA/FC levels, might have to allow FC to come down to levels of around 10-15 to do final OCLT.
- Jun 22, 2014
- 47,995
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
