Long SLAM process

[kimkats]

Do you run the rinse cycle after you back wash?

 

[Envieddesigns]

Do you run the rinse cycle after you back wash?

Yes, I run it until the glass is clear I count only ten seconds. Maybe it’s that, the manual recommends half a minute or 1 full minute or maybe when I shut the power switch off and move the valve back to filter I’m doing it too quick and I’m not letting whatever’s in the valve settle before switching over? I do it quick like those people you see in an assembly line that look like robots working quick.
Water was clear this morning a there was no visual cloudiness when I brushed this AM.

 

[Envieddesigns]

Yes. What's in the water is obviously in the water already. And this time of year we are all going to have pollen and whatnot blowing in to confuse things further.

But the way it stirred up when changing mpv settings was really suspect. Some floaties floating around is one thing. Anything settled on the floor should have stayed there.

Water was clear this AM. No visual dirt or cloudiness when I brushed this morning. I turned the pump off an on a could not see any visual sign of stuff shooting back in.
Also my pressure gauge when I turn the pump off the gauge did not go all the way down to zero and when I turned it back on it dwindled a bit before going back to her usual spot I just ordered a new gauge this one could be flaking on me.

 

[Envieddesigns]

Raising my cya with the sock method what do you suggest I do with the flakes that come out of the sock when I occasionally squeeze the sock. They end up sitting at the bottom. Since I’m in the middle of a slam and need to vacumm do I let them be or suck them up into the filter?

 

[Newdude]

It's acid, so brush or vac it so it doesn't sit on the finish.

Find a better sock or tie the top better.

 

[Envieddesigns]

It's acid, so brush or vac it so it doesn't sit on the finish.

Find a better sock or tie the top better.

Lol yea I should it’s a hand knitted sock by grandma. Hey this is where my backwash comes out looks like some sand an DE is that normal on a backwash?

 

[Newdude]

Hey this is where my backwash comes out looks like some sand an DE is that normal on a backwash?

I believe that points to possible MPV issues, but I speak cartridge. Let's ask @Texas Splash

 

[Texas Splash]

It's not unreasonable to see a little sand exit from a backwash, but not a lot in a short period of time. Are you seeing potential sand from the return jets as well?

 

[Envieddesigns]

It's not unreasonable to see a little sand exit from a backwash, but not a lot in a short period of time. Are you seeing potential sand from the return jets as well?

I’m not positive if sand is entering through the returns. I can see the water clear but when I turn that light on there are things passing through the light that I suspect is sand but I can’t tell. The mornings I don’t see anything in the floor, when I brush the floor I don’t see anything come up either.

 

[Texas Splash]

The mornings I don’t see anything in the floor, when I brush the floor I don’t see anything come up either.

That's good. If in doubt, maybe faster a think sock or nylon over a return jet for a few hours to see if it captures anything. If the sand at the waste line gets worse or you find settings from the MPV behaving in an odd maner, you migth need to remove the MPV lid and inspect the gasket.

 

[Envieddesigns]

That's good. If in doubt, maybe faster a think sock or nylon over a return jet for a few hours to see if it captures anything. If the sand at the waste line gets worse or you find settings from the MPV behaving in an odd maner, you migth need to remove the MPV lid and inspect the gasket.

Oh and the sight glass there’s always little sand in it from the beginning when I put that new valve assembly on and did my first backwash. I should take it out empty it and see if it gets sand in it again on my next backwash.

 

[Envieddesigns]

So in opening up my filter and doing a deep clean on it yea some stuff came out it wasn’t heavily dirty. What I did find is my sand bed is 16” from the top of the filter and the manual calls for it to be 6” so I have to top it off. I’m assuming this could be my issue with my CC not going down.
I don’t know if I should just take the sand out and inspect for any damage to the stand pipe assembly since I am not getting sand settling on my pool floor that would be a sign that I have a crack or issue with the stand pipe/laterals no?

 

[JamesW]

Sand from backwash is a sign of too much flow.

45 gpm is a good backwash flow.

Your pump can do about 75 gpm.

 

[JamesW]

For an effective SLAM, it is important to keep the FC at 75% to 100% of the SLAM level.

If you are going below 75%, the SLAM will take a lot longer.

Are you always staying above 75%?

What is the CYA level?

 

[Envieddesigns]

For an effective SLAM, it is important to keep the FC at 75% to 100% of the SLAM level.

If you are going below 75%, the SLAM will take a lot longer.

Are you always staying above 75%?

What is the CYA level?

My CYA level is 30, slam target says 12. That’s where I’ve been trying to maintain it at.

 

[Envieddesigns]

My CYA level is 30, slam target says 12. That’s where I’ve been trying to maintain it at.

Correction yea I try to maintain at 12 but for example yesterday 7:30 AM I had an FC of 18 and when I came home from work at 5:37 pm my FC was at 9

 

[Envieddesigns]

Correction yea I try to maintain at 12 but for example yesterday 7:30 AM I had an FC of 18 and when I came home from work at 5:37 pm my FC was at 9

So I was about 100 Lbs of sand low added two 50 Lbs bags. Is it normal to see a strand or two of sand grains float up the center stand pipe while doing the deep sand filter cleaning?

 

[Envieddesigns]

Good day all,
I’m still battling with the SLAM process on my pool.
I did the deep cleaning on the filter on the weekend and added some more sand, did a backwash before filtering and replaced my pressure gauge and started it back up after being down a few hours. Clean psi 15 which I’m still holding since no backwash yet.
Added more stabilizer. And I increased my SLAM target thinking my CYA would be 40-50.
Well CYA reading is still 30
Yesterday AM I had an FC of 20 CC 2.5
Added 46oz liquid bleach to get her to 22.
Came home around 6pm and FC was 8.
Pool gets sun from 9am-6pm

Tested last night FC 25 CC 1.5
Now this morn I’m FC 23 CC 2

Water is clean clear but I can tell the clarity is not right. Can something else be going on other than Algae? I’m on my 9th Gallon of chlorine

 

[Texas Splash]

Is there anything else below the waterline you haven't been able to inspect either because of lack of time or the water still being too cold to enter? It seemed like last week on the 9th you had a big break in water clarity and no more junk blowing back into the pool, so you should be getting close. Loosing 2 ppm overnight in hours of darkness tells us there is something still active in the water. So add that along with the sun exposure and that would explain a large daytime loss of FC.

I would be very curious about any other potential areas in the pool where algae might hide. Anything? (Light niche, steps, drain cover(s), vacuum port, etc?

 

[clambert1273]

Good day all,
I’m still battling with the SLAM process on my pool.
I did the deep cleaning on the filter on the weekend and added some more sand, did a backwash before filtering and replaced my pressure gauge and started it back up after being down a few hours. Clean psi 15 which I’m still holding since no backwash yet.
Added more stabilizer. And I increased my SLAM target thinking my CYA would be 40-50.
Well CYA reading is still 30
Yesterday AM I had an FC of 20 CC 2.5
Added 46oz liquid bleach to get her to 22.
Came home around 6pm and FC was 8.
Pool gets sun from 9am-6pm

Tested last night FC 25 CC 1.5
Now this morn I’m FC 23 CC 2

Water is clean clear but I can tell the clarity is not right. Can something else be going on other than Algae? I’m on my 9th Gallon of chlorine

Don't worry about the gallon count. I ended my slam at 38 gallons but I cleaned a lake basically