- May 3, 2014
- 62,698
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Maintain your FC at SLAM level. Test FC and add liquid chlorine several times per day.
Brown/Light Grey substance keep appearing on the bottom of my pool
- Thread starter Mshepels
- Start date
IF you follow the TFP guidelines you can be enthusiastically optimistic and it will work.
Hundreds and hundreds of us (thousands) have followed TFP and we have crystal clear water costing only a fraction of what the pool store sells. And avoiding pool store advice will give you a sparkly clear pool, the envy of the neighborhood.
This morning the water was clear with some dark staff in little gaps of the liner, again, less than usual, color is darker there is no more light grey staff. FC went down to 11ppm (it was raining most of the day yesterday) I added 13oz as per the app and raised it to 12ppm. I should continue with the Slam process until it disappears completely? Could it be regular dirt, not dead algae?
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MITBeta
Gold Supporter
- May 28, 2020
- 1,239
- Pool Size
- 13000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Glad it's looking better.
The dark stuff is dead algae that drops to the bottom. Slowly sneak up on it (per Richard320) with the vacuum and slowly vacuum it up. If it goes poof, it's algae and it got away from you and went back into suspension. If it stays on the bottom it's regular dirt. Most likely not dirt. It's algae.
Only after vacuuming the specific algae mounds should you then brush the walls and bottom of the pool. If you brush before you vacuum, the algae will go back into circulation and you can't vacuum it up. As it dies, you will see more of it.
Yes, continue the SLAM until it disappears completely. You want to get ahead of it, not just keep up with it.
The SLAM goes faster when you are keeping the FC at SLAM level and add chlorine several times throughout the day, right before bed and first thing in the morning.
When you say vacuum you mean to waste or through filter will pick it up?Glad it's looking better.
The dark stuff is dead algae that drops to the bottom. Slowly sneak up on it (per Richard320) with the vacuum and slowly vacuum it up. If it goes poof, it's algae and it got away from you and went back into suspension. If it stays on the bottom it's regular dirt. Most likely not dirt. It's algae.
Only after vacuuming the specific algae mounds should you then brush the walls and bottom of the pool. If you brush before you vacuum, the algae will go back into circulation and you can't vacuum it up. As it dies, you will see more of it.
Yes, continue the SLAM until it disappears completely. You want to get ahead of it, not just keep up with it.
The SLAM goes faster when you are keeping the FC at SLAM level and add chlorine several times throughout the day, right before bed and first thing in the morning.
Your cartridge filter will pick it up and you'll have to clean it more often, once the pressure rises 25% above the "clean" filter ppm.
If you dump it to waste, you'll need to replace some water and FC. People do it either way.
If you don't have a spare cartridge to use in the filter while cleaning the first one, you will be shutting off the pump while you clean the cartridge. I've read someone said you can circulate the water without the cartridge, but I don't know for sure. And it definitely would not be filtering without the cartridge.
We have a sand filter and I don't bother to dump to waste when I vacuum algae. I let it go through the sand.
If you dump it to waste, you'll need to replace some water and FC. People do it either way.
If you don't have a spare cartridge to use in the filter while cleaning the first one, you will be shutting off the pump while you clean the cartridge. I've read someone said you can circulate the water without the cartridge, but I don't know for sure. And it definitely would not be filtering without the cartridge.
We have a sand filter and I don't bother to dump to waste when I vacuum algae. I let it go through the sand.
Hello. I am doing the SLAM processes for a week now, vacuuming and brushing every day. The pool water has become considerably better, crystal clear. The dead algae have come down a lot. However, I just can't seam to get rid of it completely. There are still small amount that is gathering on the bottom of the pool. I am not sure how to proceed. I am posting some pictures. Maybe, it has something to do with the tree that is right above the pool? Any advice please? Thank you very much.
Attachments
- May 3, 2014
- 62,698
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
- May 3, 2014
- 62,698
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
The OCLT needs to show a far less FC drop than that to finish the SLAM. Stay at it.
Question... the dead algae at the bottom will disappear as you keep slamming.. the reason I ask is because I brush and vacuum and it still there far less but it shows back up will slamming make this dead algae go away?
- May 3, 2014
- 62,698
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Following the SLAM Process. If you continue to get dead algae, it was killed by the chlorine. Patience.
^^^^what he said.
Also, first, going very slow, vacuum up the visible dead algae on the bottom. You can vacuum to the filter. Does not have to be to waste.
THEN brush. This seems to help a lot.
Also, first, going very slow, vacuum up the visible dead algae on the bottom. You can vacuum to the filter. Does not have to be to waste.
THEN brush. This seems to help a lot.
I am out or chlorine testing reagent. I have to wait till Monday to get a refill. Any advice what to do meanwhile?
- May 3, 2014
- 62,698
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
- Jun 8, 2019
- 4,581
- Pool Size
- 20000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Make sure to check inside and under anything that could be hiding algae. Skimmers, weir doors, light niches, ladders, steps. You might have some there that is hiding from the chlorinated water.
The pool is empty now, the stairs are out of the pool at the moment. It is above ground pool. The only things that connected are soft hoses going from skimmer to filter, SWG and back to the pool. I can't think anything where algae would hide. Could chlorine at this level for so long ruin the vinyl liner? I started noticing dark brown dots on the bottom that wouldn't come off by brushing. "Dead algae" doesn't get more or less at this point. Very frustrating.
By "my pool is empty now" i meant there is nothing in there but water
