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Interesting- I wonder if, in a real pool, other reactions (chloramines, ...) could also account for such a difference by producing a 'gain' effect as FC varies. I noticed that as the pH electrode ages (w/o calibration), it tends to read a higher-than-actual pH, causing the controller to add...

I found this online, and it contains a wealth of pH and ORP info including temperature corrections, equations, etc.. Most is way beyond me, but I liked the the use of red cabbage or mushrooms to measure pH. Title is 'Back to the pHuture'. Yokugawa mfrs industrial instrumentation. The link is...

Thanks chiefwej! I too have the Heliocoil panels which I forgot to add to my sig. As a fellow Tucsonan, you know we get the occasional dust storm, and in my case some mesquite debris (hard to imagine a worse near-pool tree). The VS pump appealed to me too because of the flexibility, but after 40...

A two-component question: I presently have a 20yr old 1/2hp Purex WhisperFlo that has just started to leak. I'm considering replacement with either a Pentair VS or hi-eff two-speed pump. My (winter) ELX cost is $0.12/kWh ($0.18/kWh in summer). I have an 80 sf cartridge filter and a solar heater...

I have a pH/ORP Technopool controller, and had to chime in esp. regarding probe costs. The Technopool is made in Italy, so I really quickly found USA sources for almost everything it expends. Oakton and Extech plastic-body pH probes start at $30 and ORP probes start at $50 on Amazon; you may get...

Technopool pics I mounted the unit onto a panel so I can take it in for the winter. It uses a rear dovetail & plate for mounting. I used ells for the manifold ends so the electrodes wouldn't dry out if the filter drains down. I tied into the filter hose bibb and a drain on the heater, and use...

Trying out a Technopool- After a bit of study on these forums, I got an Aqua Technopool Rx+pH model, and have had it in operation for a week or so. I used XETrade to send a wire transfer after getting a quote with Aqua Italy; even today sending money internationally is like watching your...

Susa, the aqua.it equipment is very appealing. I emailed them for a brochure and they promptly sent one (likely an automated response), but no response yet to a follow-up email from me asking for price/shipping info on a few of the controllers. Been just a few days though. Should I try Google...

D'oh! Simicrintz, you did indeed say 30 days. I'll leave the K/K out till then and just vacuum (with a brush head).

Thanks for the advice! I test the CH every few days & will look for a rise. The pH has trended upwards too as I would expect. The builder put the K/K back in a few days after the fill & set the pump for 8 hrs/day. He said the pebble finishes are far less delicate than plaster. I also have a...

I'm new to TFP. I just had a replaster done using Pebblesheen, including the final acid wash; a few days after the fill the builder turned it over to me. My first test shows a CH of 80 (low!), with the other levels as follows: FC 3.0/CC 0 pH 7.5 TA 120 CYA 70 Testing temp = 68F/pool = 60F. I...