Can too much chlorine be my problem?

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Oh that! Yes, I have pool lights. So you're saying that enough algae gets out to cause problems, but not enough chlorine gets in to fix the problems? I don't know if I like what I see in them. The you can see something suspicious in the picture although it looks clearer to the naked eye. I can tell you that the green stuff you can see in the lens isn't a reflection or anything like that; it's something in there. I guess I'll have to find something to clean out the cavities.
Also, I'm wondering if my problem is really sand and not algae. I put enough liquid chlorine into the pool last night to bring it up to 20ppm, but this morning, I found it more than that! Nevertheless, I found a pile of I-don't-know-what-anymore on the pool floor. Also, I noticed that little viewing bulb on the filter had what looked like sand in it, from when I did the first backwash.
Finally, I made a video of me poking at the deposits to see if they behaved like sand or something else. What's the best way to present a video on here? At 400Mb, the server doesn't want to let me attach it.
 

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You can upload the video to you tube then just post the link.
I am not sure what lights those are or how they come apart. Do u have the paperwork from your build? If there’s a niche that the light rests in there can be stuff in there. There are some nicheless lights that simply must be replaced if water intrusion occurs.
As mentioned earlier - algae forms biofilms to protect itself from chlorine - unless u scrub that away the algae will continue to grow. It’s basically stagnant water inside the niche.
As for the stuff on the bottom of the pool- if u can collect some of it,
gritty = sand, slimy = algae
Algae (dead or alive) poofs when brushed.
 
The people I bought this place from last year left me paperwork for the garage door code and that's it! They are embedded in these cavities or "niches". I can pull them out and probably do what needs to be done, after I trip the breaker of course.
Here's that video:
As I say in the audio commentary, it doesn't act like sand. It seems to evaporate quickly, which would have to be the finest sand I've every heard of. It's also of 2 different colours. The first stuff I get to looks like that pale green, but then the stuff in the deep end is very dark.
Finally, this is really weird: I tested my water this morning and the FC was a little above 20ppm. This algae (or whatever it is) wasn't there last night, so it formed overnight in 20+ppm of FC.
 
Keep slammin’ , clean out those lights, vac to waste,
& maybe add a little de to the sand filter to catch the fine dead stuff.
Basically a sand filter is the slowest to clear because it doesn’t catch as fine of particles as a cartridge or de filter essentially allowing some of them to pass right through.
Here’s the how to 👇
www.google.com

Add DE to a Sand Filter

A clean pool filter will increase the efficiency of your pool! ... your filter are to backwash it, clean the manifolds and grids, and add new DE.
www.google.com www.google.com
If u are on the fence at all about your cya, round up & raise slam level accordingly.
 
I managed to find a scrub brush, so I took out the lights and gave 'em a good (blind) scrubbing. About this bulb: I take it that it doesn't matter that there's this ugly, orange liquid in it? Unless it does?
I also spoke w/a professional today. I was told a lot of people have been having algae problems around here. Something to do w/the daily temperature inversions? Maybe it's not so much a matter of these lights providing a steady supply of algae to the pool, but temperatures keep dropping sharply at night.
Status: since I've sort of scrubbed the light cavities, I've decided to run the filter for a while to see if I can get those deposits to form. Then I'll vacuum to waste, then SLAM. I'll look into getting some DE.
 

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DeptOfMeteors said:
I was told a lot of people have been having algae problems around here. Something to do w/the daily temperature inversions?
Click to expand...
Nah, that's just one of those imaginary excuses pool professionals throw around to take the burden off of them for poor management. This is just the time of year when pucks have put enough CYA in to the water that keeping FC at 1-3 ppm is no longer effective. Air temperatures has absolutely nothing to do with it.
 
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DeptOfMeteors said:
I managed to find a scrub brush, so I took out the lights and gave 'em a good (blind) scrubbing. About this bulb: I take it that it doesn't matter that there's this ugly, orange liquid in it? Unless it does?
I also spoke w/a professional today. I was told a lot of people have been having algae problems around here. Something to do w/the daily temperature inversions? Maybe it's not so much a matter of these lights providing a steady supply of algae to the pool, but temperatures keep dropping sharply at night.
Status: since I've sort of scrubbed the light cavities, I've decided to run the filter for a while to see if I can get those deposits to form. Then I'll vacuum to waste, then SLAM. I'll look into getting some DE.
Click to expand...
I think that may be rust ?
& the temp thing is hogwash..
 
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