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Does indirect sunlight affect pool chlorine, or direct sunlight only? We have a large tree line to the west and direct sunlight is gone relatively early. Is it ok to add my nightly chlorine dose, or is it better to wait until closer to evening? Thanks!

I ran across the instructions for doing this test: https://www.troublefreepool.com/threads/chlorine-date-code-decoder-easy-way-to-measure-strength.83147/page-2 I used distilled water, measured out 1000ml using a graduated cylinder, then added .1ml of my chlorine using an old insulin syringe...

So I'm price shopping and see similar part numbers, not sure about compatibility. The number stamped on mine is SP-1500-D2. Anyone know if this is the same as SPX1500D2? I found one that says SP1500D2 in the description, but the image of packaging says SPX1500D2... Thanks

I've used a weighted pool cover drain for periodically draining my above ground pool cover, and about every year I have to get new vinyl tubing because the old line gets so stiff. Is there a better tubing that will last and remain flexible? I looked at latex, but I'm afraid that's too soft.

Using the TFT100, after adding 5 drops of R-008 to turn the sample to green, I'm not sure when to stop adding drops of R-009 to turn sample back to red. At 4 drops, the sample begins to turn red, but it is not until 6 drops that it is more definitely red. So would my alkalinity be 40 or 60...

So starting DAY 5 (yes, caps intentional.) of SLAM. Now out of R0871 drops. Having to re-order in the middle (well HOPEFULLY at the END) of SLAMing. Suggestions requested as to best way to carry on without risking having to do-over (after spending over $100 on liquid chlorine) since we lost...

Starting day 3 of SLAM. Noticing a brown stain on the vinyl at the water level. The stain is only about 1/3 of the way around the pool. The stain is concentrated just past the return outlet. It does not brush off. What would be causing this?

My first post (a week or so ago) was regarding the use of PhosFree (pool store said my phosphates were extremely high). As suggested by the forum, I returned it, and instead purchased a TFT100 test kit, which I just received yesterday. This was regarding my (continuing) problem of not being...

We had pool wall stains, and decided to use ascorbic acid "Stain Free." The readings on the test strip were: Ch:0 Ph: 6.8-ish TA: 8-ish CYA: 30-50 -ish I don't know any of the other levels. (I've browsed enough recently on the forum to guess you will scoff at test strips, but that's what I...