6 Gallons of MA to descale new pool?

AFJz

Member
Oct 9, 2024
18
San Antonio, TX
Pool Size
10000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Hello, I’m a new pool owner and actually waiting on our final “pool cleanup” and getting the water balanced. My upfront question is, is it normal to use 6 gallons of MA in order to try and quickly breakdown scaling on a fiberglass pool?

Backstory for more context:
Our pool sat with water in it for 2-3 months with no equipment/circulation/chemicals and turned into a nasty swamp, literally, frogs and all. Concrete got finished about a month ago around the edges, so they started to attempt to clean it then. They got it somewhat clear, but it had a ton of scaling on sides and bottom from sitting for so long, and it wasn’t brushing off, so they threw some Scaletec in it and said it needed to sit for a couple weeks. Oh, we also still did not have equipment until last weekend, so still no other chemicals or circulation. Of course the pool turned almost black within two weeks. We finally got equipment installed and they came back out to start cleaning again. The guy ended up just adding some type of flock that he said would kill and drop all the algae to the bottom and he’d brush and vacuum it up the next day. He initially started to use his external pump/filter but stopped and turned our pump/filter on because he said there was no rock and was just algae so that’s what our equipment was built to filter out. He said the water would look crystal clear the next morning (it did not, was still slightly green and super cloudy), and he’d just vacuum it out and use Scaletec to keep breaking down the scaling. He couldn’t come out the next day so another guy was sent. I asked about the flock being used while having my cartridge filter now filtering the water because I since read that you should push flock through a cartridge filter. He mentioned something about cleaning the cartridge filters and checked out the scaling. Then said not to swim in the pool because he was going to shut off all the equipment and add 6 gallons of MA (yesterday) and come back today to brush the pool, then come back Friday to vacuum and balance the water. I’m actually not really sure how he plans to brush the pool very week because the water’s cloudiness has not changed and you can’t see half of the sides or the bottom to even tell if anything is brushing off or where you brushed.
I may have missed some details, but this is essentially where we’re at right now. I can’t (or don’t want to) test the water myself right now because it’s just full of MA and has had nothing else really added so
I’m sure the levels are WAY off and he’s coming back on Friday to throw more stuff in it…so I was going to do a test on Saturday to get at least some baseline for myself so I also have a little more piece of mind.
 
I am not sure what you are asking but you have very acidic pool water with the 6 gallons of MA. That is not safe for swimming. And I think it can take more then a day to get proper water chemistry.

You have another thread going here and there is much more to your situation then you described...

 
I am not sure what you are asking but you have very acidic pool water with the 6 gallons of MA. That is not safe for swimming. And I think it can take more then a day to get proper water chemistry.

You have another thread going here and there is much more to your situation then you described...

Yes, it’s been an “exciting” roller coaster with this pool company and thinking that we may be swimming in our pool that was started many months ago, and things just keep popping up. So the MA was supposed to take care of the terrible calcium or scaling that is on our pool, so the chemistry and startup could happen. I actually thought that had worked (and would be balanced out today), but that’s not the case. In my other thread I was trying to understand the salt aspect of starting a saltwater pool, and this one was to see if that amount of MA was normal for the situation. We still don’t have the chemistry or salt even started yet, because when the guy came today to vacuum out all of the flock and debris, he said the scaling is still pretty bad, so he vacuumed the flock/debris, and then dumped 11 gallons of MA to sit in it until probably Monday afternoon (4 full days), then brush it, then vacuum and balance out the water on Tuesday. He had 9 bags of salt with him that he never dumped, and our equipment is staying off. I don’t believe any other chemicals were added. I’m hoping the massive amount of MA will keep algae away for the 4 days, but I have no clue and am just wanting this pool to be “completed” already.
 
Yes, it’s been an “exciting” roller coaster with this pool company and thinking that we may be swimming in our pool that was started many months ago, and things just keep popping up. So the MA was supposed to take care of the terrible calcium or scaling that is on our pool, so the chemistry and startup could happen. I actually thought that had worked (and would be balanced out today), but that’s not the case. In my other thread I was trying to understand the salt aspect of starting a saltwater pool, and this one was to see if that amount of MA was normal for the situation. We still don’t have the chemistry or salt even started yet, because when the guy came today to vacuum out all of the flock and debris, he said the scaling is still pretty bad, so he vacuumed the flock/debris, and then dumped 11 gallons of MA to sit in it until probably Monday afternoon (4 full days), then brush it, then vacuum and balance out the water on Tuesday. He had 9 bags of salt with him that he never dumped, and our equipment is staying off. I don’t believe any other chemicals were added. I’m hoping the massive amount of MA will keep algae away for the 4 days, but I have no clue and am just wanting this pool to be “completed” already.
So my initial question was just, is it normal to use massive amounts of MA to break down really bad scaling in a new fiberglass pool?
 
I cannot see how you could get scale in a fiberglass pool in your situation. You might have concrete that got put in during the finish work.

Hopefully you do not have waterline tile.
 
I cannot see how you could get scale in a fiberglass pool in your situation. You might have concrete that got put in during the finish work.

Hopefully you do not have waterline tile.
Our pool sat with very hard, stagnant water for over 2 months, and then the concrete around the pool was completed, and the pool was “cleaned” right after that was complete. The water was clear then, but they said it had a lot of scale with concrete dust, and used Scaletec…they’ve been using the MA since (twice now), because even though it seems to be slowly coming off, there’s still quite a bit.

Should a fiberglass pool not get any scaling if it sits with hard water for a couple months? I really have no clue and would be curious what it could be? And also if all of this MA bring added is doing other types of harm??
 
I doubt you can get scale below the water line with just water addition for a couple months. I bet it is concrete dust that has set up.

Should not do any harm unless they run it through the surface equipment. Be sure they neutralize and displace out all that water before adding any salt or other chemicals.
 
I doubt you can get scale below the water line with just water addition for a couple months. I bet it is concrete dust that has set up.

Should not do any harm unless they run it through the surface equipment. Be sure they neutralize and displace out all that water before adding any salt or other chemicals.
Thanks! It seems like they are trying to do that before the salt and chemicals.Do you know if algae can start to grow in 4 days with the pool being that acidic?
 
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