New to me pool - Progress pics

Sparkling Water Enjoyer

Bronze Supporter
Mar 5, 2025
53
Northern California
Pool Size
21500
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-45
Hi all! I just purchased a home and have started my journey of educating myself on poolchem.

I am really grateful for the guides here, especially the Ascorbic Acid guide.... See pics below for how it transformed my 30year old pool that had iron slowly deposit over the years.

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Before pic, I noticed the equipment (nozzles) had an orange tint to them, and thought it was odd. I did a little test to see if it was Iron, by using an Emergen-C packet, and pouring it on one of the steps.

PXL_20250301_193626356.jpg


You can clearly see the blue circle where the vitamin C cleared the iron off. Mind you, this pools water is perfect, and I had scrubbed it with a brush. We were told by the sellers to get it replastered as "it was due".
Seeing the vitamin C work, I sourced and ordered about 4lhs of it, and using the Ascorbic Acid guide on TFP, I started the process.

PXL_20250301_194625056.jpgPXL_20250301_205325829.jpg

At this point, I ran out of Ascorbic acid, and had to order another 4lbs. The iron stains were old and severe. I applied the second bucket, and make the decision to drain and refill after 24hrs instead of using a sequestering agent to contain the iron in solution. So, I drained the pool, rinsed it out, and patched a thin spot or two on the plaster, then refilled it.


When I got home from work yesterday, the pool was nearly filled, and honestly I was completely shocked by how severe the iron contamination was.

PXL_20250304_220638136.jpg

After the water filled, I balanced ph, added CYA, Chlorine, and salt. Today I'll check those balances, then add some calcium and call it good.


My next project will be replacing the 35 year old equipment, so I'll be taking some pics and making a thread for advice on that. Fortunately the previous owners kept all the documents for the pool, blueprints, dimensions, pipe sizes etc so that really takes out much of the guessing work. I'm aiming to either replace my SWC or upgrade the whole unit, replace the pump with a variable speed one, and am looking at if I need to replace the filter assembly or not.

Thanks for the guides here!
 
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You other newbs take note. THIS is how you make an entrance !!!!

And Welcome to TFP !!! :wave:

Have some links in case you missed any:

Pool Care Basics
FC/CYA Levels
Test Kits Compared
PoolMath
TFP wiki
Thanks!

I'm looking to upgrade some equipment, and started a thread for that. Any pointers would be great!

 

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Well, everything you cleaned off the plaster is still in the pool so it's probably coming back to haunt you. You probably need to drain it before the rest of what you cleaned up settles out of the water.
 
Well, everything you cleaned off the plaster is still in the pool so it's probably coming back to haunt you. You probably need to drain it before the rest of what you cleaned up settles out of the water.
Hi there,

This is after I drained and rinsed out the pool. I'm on day 3 of a full tank of fresh water 😊
 

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Fast filter cycles almost always point to algae. Does it poof when brushed or are those spots stained again ?
 
Fresh water from hose spigot. I tested it, and it wasn't heavy on metals at all (.01).

Water is looking less green after getting more chlorine and running all night.

I gave it a brush as well, and I believe there was some poof that appeared. Going to take a pic once the sun comes out more to compare.
 
Not the best practice, just a good garden hose water nozzle is safer for the cartridges.
I assumed it would be harsh, however this filter is getting trashed in a week, and I had already washed it out twice today, and wanted to ensure I was actually cleaning it properly. I definitely wont do that with the new filter setup.

There definitely was a brown sludge coming off the filter so, something is growing.

Honestly I am kind of shocked that anything was able to grow with the temperatures here, and that it was fresh water.
 
I assumed it would be harsh
Pressure washers are fine so long as you're not an idiot. Start back some and slowly move in closer and you'll find the sweet spot of becoming clean without stressing the pleats too much.

I'm sure it's exactly what you did. Lol.
Honestly I am kind of shocked that anything was able to grow with the temperatures here, and that it was fresh water.
Had you shocked, nothing would have grown and therin lies the conundrum. :ROFLMAO:


But yeah, you're seeing the small filter in action right now. A filter that's 3x as large would go 3 times longer. Which still isn't great depending on how bad the algae is, but it's something. With no algae, the large filter will go months and months. Many of us don't even need to clean it each season, but we do for good practice at least once.
 

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