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I tend to think that if an acid wash shows an effect, then it will have taken some plaster away. The only recommendation here is that acid washes are usually not recommended. In most cases you are better of putting up with some optical imperfections. In many cases (like metal staining) there...

Great progress, awesome work!

Looks like you're getting on top of TA now, good job. Leaks can be annoying to find. There are some tips in this article, see if that helps: https://www.troublefreepool.com/blog/2019/01/18/suction-side-air-leaks/ It's great to see the progress with your pool, what a great project that you've...

I should add that in your case with a vinyl liner, low CSI is not really a concern for you, but high CSI can be. But as long as you keep TA in TFP's recommend range, and CH is not above the ideal range, CSI will be of not much concern for you. You certainly don't have to worry about low CH...

Even though Hardness (CH) and TA are both measured in the unit ppm CaCO3, they are still different things. Having a CH of 100ppm means you have the same amount of CA++ ions in the water as you would get from adding 100mg of CaCO3 to 1l of water and dissolving into the water as Ca++ and CO3--...

Good. That seems to match your water report. If the report is also correct about TA and it is around 500, then your CSI would be probably between 0.3 and 0.4 thanks to the colder water. That's not too bad for now, but once you get to 25°C-30°C, CSI would be above 0.6, which would result in...

The Alkalinity test instructions say to add 10 drops of dechlorinating reagent, independent of the sample size being used, so I assume it must be enough even for an 80ml sample. For a 40ml sample, 5 drops should definitely be enough. You'll see if it's not enough when the indicator bleaches out...

Loving your project by the way. Great effort.

Both those tests should work. The calcium test will give you ppm Ca, which you will have to multiply with 100/40=2.5 to get ppm CaCo3. For the Alkalinity test, you'll only have to order the titrant and the 4.5 Indicator which is for Total Alkalinity which they call Alkalinity (P) in their...

I missed that Hardness reading. But that really is Hardness, it matches the Calcium reading, just in different units, it's not Alkalinity. The difference between the Calcium and the Hardness is, apart from the different units, that one is Calcium Hardness, and the other Total Hardness, which...

Alkalinity in this report is reported in units of mgHCO3/l. In the pool world, Alkalinity is usually reported in units of mgCaCO3/l. HCO3 has a molecular weight of 61, CaCO3 has 100. That means that the test result in this report has to be multiplied with 100/61 to compare it with your test...

I tried the PoolLab out of curiosity, and was actually positively surprised by it. The FC test seems to give reasonable results with the caveat that FC has to be below 8ppm which rules it out for me, as I am usually above 8. But for your indoor pool with low CYA it should work. And I was...

I don't know much about fibreglass pools or indoor pools. But since nobody replied yet, I'll give my 2 cents worth, also to give the thread a bump, hoping that more will chime in. My first thought was that it looks like Swimex is trying to make sure that they never ever have to pay for warranty...

What Dirk said. In areas with lots of rain (where you have to drain water (containing calcium) to make room for more rain (containing no calcium), CH can drop over time, when the fill water CH is sufficiently low. My fill water has CH 30 (or 40, can't remember exactly). During summer, when...

I just use the garden hose to get salt residues off. I guess we're lucky here that our water is very soft, so we don't have to deal with scale.

We had to increase the height of the paling fence to the neighbour to 1.8m - even had to put 20cm extensions on the existing fence posts to get them to 1.8m. So, apparently 1780mm is still low enough to encourage children (we are worried about the little ones who can't swim yet - in Australia...

As soon as there's salt in the water and you have kids splashing in the pool, the decal is occurring naturally. Speaking from experience...

Looking absolutely amazing, great work :cheers:

Recent example of a pool turning into a salt water pool: https://www.troublefreepool.com/threads/salt-level-is-at-2450ppm-in-the-pool-no-swcg-any-concern.216295/

I don't think there is a definitive answer. The point that Casey and I were trying to make is that, if you are worried about corrosion, then you shouldn't have any pool ;), as after a few seasons the salt levels of a non-SWG and a SWG pool are not all that different - but definitely still an...

What PBs usually don't tell their customers is that adding chlorine will also increase the salt level over time. Topic has recently been discussed here: https://www.troublefreepool.com/threads/is-swcg-a-good-fit-for-my-pool.215485/post-1885309 Quite a few TFP members who changed over to SWG...

Love that idea! And definitely go with a SWG. I think I would have filled in my pool a long time ago without one - certainty wouldn't have dug out one and then not install a SWG. After all that work you'll have earned the right to sit back, relax and enjoy that pool - and not worry about...

When we bought our house, we didn't want a pool, but it came with one. We seriously considered filling it in. But we didn't. And I'm glad we didn't. But I am sure there are lots of people round that fill in perfectly good pools, just because they don't want a pool. Apparently the pool was built...