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You’ve discovered the difference between TFP methods and pool store methods. They cannot be mixed. The pool store will not fix this. They don’t know about the methods here, nor can they be convinced to follow them.

@shaneymack click on the drop down where it says “what will you use...” and choose Muriatic acid, 31.45% 20 Baume. That’ll give you the correct dose. Then make sure that is the concentration of acid that you buy.

How much stabilizer did you add? I see you weren’t using pool math, so I’m curious what you were targeting and how you arrived at the amount needed to reach your target?

Use pool math to calculate your dosing amounts. I will tell you that it never hurts to keep a few gallons of Muriatic acid on hand. So far this season, I’ve used 4 gallons. I buy them 4 at a time from my local home improvement box store. Just don’t store them around any metal. I store mine...

How does your water look? The CH is really high. Could there possibly be a testing error on that one? Have you used cal hypo at all? Have you tested your fill water? I believe vinyl pools do ok with high CH, but I’ll summon @mknauss and @Richard320 for that. Assuming the CH is something we...

At first, you should test as often as you can. I've seen some people test every hour in the beginning. Some can only test the minimum recommended amount (3X/day). If you are heavy on reagents, I would test every hour or two, it will keep your additions smaller and you'll stay on top of it...

Heavy rains typically do not have a huge impact on pool chemistry. We recently got about 9" of rain in a night here in Nebraska. I had a similar situation where the water looked slightly hazy. I ran my dolphin the next day and brought by FC up to SLAM just in case and went off to work. By...

I’m very sorry to tell you this, but those test strips are absolutely worthless and we cannot give you good guidance based on their results. I would not recommend making chemistry decisions based on test strips. You need a test kit that can tell you the actual status of your water.

Let us know what happens with your OCLT, and a fresh CYA test.

I’d do another CYA test in full sun. Until then I would keep FC at SLAM and test at least every few hours. Heck, I’d consider this a full SLAM and just follow the procedure.

If you are confident in the CYA reading, I would keep it at SLAM level until you can pass an OCLT. Something is eating the chlorine up. Maybe start testing and dosing every few hours for a bit just to be sure. Otherwise, verify your CYA test to be sure you’re actually at a SLAM level.

I see a robot in the water, does it have any hint of blue when you clean the filter in it? Since it is scrubbing the liner, I would expect it to pick up something if it is the liner.

May I suggest some light reading while you are waiting for your kit? https://www.troublefreepool.com/blog/2018/12/12/abcs-of-pool-water-chemistry/ https://www.troublefreepool.com/blog/2018/12/12/slam-shock-level-and-maintain/ You will likely be performing a SLAM once you get your kit, so that...

@IceShadow just beat me to it. What he said!

Welcome! I grew up in Idaho! Stick to the advise you get here!

Please. Stop. Blindly. Throwing. Chemicals. In. Your. Pool. Take a breath. Read the ABC’s of water chemistry and Pool School and learn how to take control of your pool. Get a good test kit and start managing it with the love it deserves.

I’ll leave the light issue to you to decide. Mine are not Multicolor, I know those are quite expensive. I was given the choice for the multicolor but I don't recall what the upcharge was going to be because I didn't really want them anyway. The site is blocking me from uploading the pictures I...

Yes, I have 2 of the Pentair LED lights. My pool at its longest is 33 feet. My feedback would be to get at least 2 lights. A single light would probably not do a lot for you with a 40 foot length. I will get that picture you asked for today, work has been in the way so far this morning.

We are very happy with the liner. I wouldn’t change anything with it at all. I’ll snap a pic in the light tomorrow.

@Slopezn1789 I do not believe it is grey mosaic light. I am certain the liner we chose is Colbalt Lake/Grey Mosaic.

Here’s a link to a daytime picture. Grey Granite Steps

I can see the Phillips screw heads on the main drains in the 8 ft. deep end. Heres a night picture with the lights on. If you want daytime pics I’m sure I’ve got some

I have that liner with a border. I’ve posted quite a few pics of mine if you want to look through my posts. There’s a build thread and a few other threads I’ve thrown some pics onto. If they don’t show you what you’re wanting to see, let me know and I’ll get you some others. Just to be sure...

Here’s a daytime picture looking back at the steps showing the liner meeting them.

Also, our liner is the Colbalt lake/grey mosaic.

I have the grey granite steps. It’s getting dark here but I’ve attached a few pics.