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Blew a 2-year-old, 400W incandescent in my spa and figured I would just go to LED. Installed a 12W, 120V, daylight-white LED (Kollniun brand) that the description said was a Spa/Pool bulb. Replaced the fixture gasket even though it was only two years old. Worked perfectly with great...

In case anyone finds this post, an update. The roller assembly should be replaced each year with the peristaltic tube. The rollers begin to stick, abrading the tube, and get very noisy. Found the Stenner Econ White Pump Roller Assembly EC350 (US Water SKU: 411-EC350) for $19 each. The Santoprene...

When visiting a friends house in St. George, Utah, I took a look at their new pool install: 4800 gallons, plaster, about 4ft deep, automated pool cover. Then I took a look at the equipment and was shocked to see three pumps, two of them variable speed! Check out the photo. All Pentair...

Hey Gene, missed your suggestion trying the mom & pop stores. Success! Of course the store is as far across Las Vegas from me as you can get, but they have 31.5% acid for about $12/gallon. Thanks!

Thank you both for your help in this and my previous issues. I really appreciate it. I'll track what happens in the pool and report back. With luck will prove out OK, otherwise, at least we get a lessons learned.

My closest 31.5% MA is the Bullhead City Home Depot. Have not found another source yet in Las Vegas, but still looking. Hmm... Just looked at Amazon again, and can get 31.5% for $26.25. Hazardous material shipping is expensive.

Anyone else using ACID Magic in place of 31.5% HCl in their IntelliChem? Any issues? This topic appears periodically, but now from me because Leslie's Pool no longer stocks 31.5% acid and sells this instead. Leslie's was the only place I had been able to get the 31.5% acid, a concentration I...

Marty, thanks for the comment. My reasoning is: I have to add chlorine in the winter, and was looking for a non-permanent, seasonal way to inject chlorine with my Stenner pump, hopefully a way needing infrequent attention once I find the correct rate. Glad you said the SWG cell did not need...

Was looking for an inexpensive dummy cell I could modify for winterizing my Pentair IC40. There's not enough space after the IC40 to attach a saddle for a permanent injection point (run into valves for spa and water feature), so thought I could modify a dummy cell to include an injection port...

Thanks for your insight Dirk, and taking the time to help. Actually, discovered that the acid tank continually develops new debris. Maybe stuff falls in when I take off the lid, or plastic scrapes from the container edge each removal. So my initial statement that you could clean the tank once...

Suggestions to eliminate acid check-valve plugging? Have a Pentair IntelliPH acid dispenser with a tank-mounted Stenner pump. The Pentair 522513Z check valve plugs once a year with what looks like fine black plastic shavings. I see a very small amount of black debris in the acid tank, but...

Just to clarify for anyone that finds this thread in a search. Yes, you can use potassium chloride in a salt water pool, although Pentair says you shouldn't and it costs three to four times more than sodium chloride. Have done so for 3 years now. For my area, refill water is pH 8.1 with...

Others have commented that ORP sensors are inaccurate. On my IntelliChem, I shift the ORP setpoint based on Free Chlorine measurement. Refilled the pool a week ago (glass tile removal -- empty to avoid shards left behind) and the ORP matching my desired FC decreased to 600mV, when before it...

Stenner confirmed their part EC30C-x as the correct one for my Pentair tank-mounted acid pump, and the one that works with the Pentair pH controller. The suffix letter C indicates the OD, ID, Santoprene material, and psi capability expected by the Pentair pH controller, so parts with other...

On my current house and pool, I use a SWG. But I found I'll need to set up a pump again for winter when water is below 50F and the SWG doesn't work. I don't heat the pool in winter, so need this from December to March. On my previous pool, I used a Stenner 45 fixed-output for chlorine with...

Still communicating with Pentair Tech Support, who is insisting the Stenner #2 tube is correct even though it is 2" too long ("Did you try installing the tube regardless of the size difference to see if it works?" OMG). The Pentair 522378 Repair Kit includes the correct, but unmarked, tube...

Doing a probably dangerous solution. I fill a 50ml syringe with 29% muratic acid, and dive down to each spot and dispense a little acid. This has completely removed most of the spots with one treatment. The couple that recurred needed multiple shots. Last treatment about a month ago, and all...

Have a Pentair IntelliChem installed March 2020, part 522621, that includes the tank-mounted peristaltic pump -- the "Blue" pump. Documentation shows the peristaltic tubing is Pentair 522480 (which was also labeled Stenner UCCP202 #2 Pump Tube). But this tube is 6.25" between the black...

Turns out more than one problem. The bubbles were interfering with the probe, but another problem too: EasyTouch8 programmed incorrectly. When in Cleaner mode, the unit was programmed with the F (filter pump) relay off. Pump is still running high speed, but the IntelliChem needs F active as...

My pool is pebble finish, but not PebbleTec. Half-dozen or so rust spots as described in this thread began four months after plaster completed 30 Jan 2020. Contractor initially claimed I dropped something in the pool (in spite of several spots on the pool wall!). He poured pool acid thru a...

There is actually a menu item on the IntelliChem for pH to Tweak. So you go to the menu item and adjust, limited by 0.2 pH units.

Have seen comments on TFP regarding ORP inaccuracy for IntelliChem. Have IC40 cell, and noticed no chlorine generation when pump on higher speed. Issue (repaired today) was leaking valve on suction side, causing air bubbles at ORP / pH sensing cell! Will continue to track, but seems to have...

Anyone have experience using an EasyTouch controlled outlet to program acid addition with a Stenner pump? Remodeling a pool (not the pool in my signature -- I'm moving), and will have an EasyTouch8 there, plus a SWG for sanitizer. Would like a daily addition of acid, but I'll need to...

The paper on stainless steel corrosion did not discuss CYA, only chlorine. I realize I'm dangerously close to an algae bloom even with 25ppm FC when I have outrageously high CYA. Hoping the pool remodel starts in a few weeks, and we can dodge that bullet. The corrosion reference was from...

We have a spa/pool combo. The time to heat the spa depends on your heater BTU rating and the spa size. With our 400k BTU natural gas heater, the 700-gallon spa heats about a degree per minute.

In case this thread is viewed later by others, first do not clean the rust using a steel-bristled brush! Or steel wool, or similar. That apparently leaves iron smears and makes future corrosion worse. Second, found that 316 stainless can tolerate (only) up to 5ppm chlorine, so...