Recent content by Plastered

I have a concrete pool. Is it safe to add granular chlorine (70% cal-hypo) after it's been closed and is it a must that I circulate the water with a sub. pump? This year I closed early and I want to top up my FC ahead of winter but don't want to keep a partial jug of liquid chlorine in the...

I have a concrete pool with attached spa. The spa is not raised, has jets and a drain. Pool and spa are separated by an opening at water level, I have a single skimmer for everything. No automation controls. I close this way, with the spa first: Drain pool below the jets, which also brings...

I bought the purest I could find and it works great. Raised CH without affecting other variables and the water seems perfect.

I wish I could find it but someone last year posted to the effect that the only purpose of the R-0870 powder is to turn the sample pink (assuming FC is present). Meaning, if one scoop turns the water pink then that's all that's needed. This has saved me time and $ as I too test often.

Thanks, gonna try air locking again. Not confident I seated the plug in the threads. I hope I'm making the right decision, but I haven't read any other threads complaining that these plugs routinely pop out.

Catanzaro, here is the long version. I have a mesh safety cover and yes we've had a lot of rain lately. Photos: https://imgur.com/a/zu6jYyg Photo 1 – pool view with connected spa Photo 2 – tiled skimmer on left, pool drain in deep end Photo 3 – Skimmer basket. Pipe closest to pool connects...

Thanks Pool_Medic, I'm unaware of any threaded blow-thru valves compatible with a compressor. I want to air-lock if possible.

Test images: https://imgur.com/a/RxFtdwt

Thank you, I will post details tomorrow.

I closed my pool about 4 weeks ago trying the air-lock method. I used a blow-through expansion valve in my skimmer. Pretty sure I was successful as I heard / saw nothing that would indicate a leaky seal. Today I decided to check the skimmer and it was full of water - the expansion plug had...

FC = 14 (got so excited I forgot to do the math)

THANK YOU to all mods and members who answer so many questions every day - including mine - and helped me take control of my pool. Just finished my first SLAM and am shocked by the great results (pun intended). FC: 28 CC: 0 CYA: 60 PH: 7.5 TA: 110 CH: 220 This 40-year old pool has never been...

Thank you very much - I used the 10ml sample and I got much clearer readings.

I'm using the 25 ml sample. Maybe I can switch to the 10 ml instead. I didn't see an explanation of why you'd use one over the other. The pink tint is so faint you have to stare at the sample for several seconds to see it's not clear. I guess I need true colorless. I was expecting these...

I'm SLAMmin' using the Taylor K-2006C for the first time. Basically my question is, how colorless does the water need to be to complete the FC and CC tests? During the FC test the water turns clear for a few seconds after adding around 30 drops but turns near-transparent pink again. When I...