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I was at a friend's place, he has lots of black spots on bottom of his pool. He said he had cleaned them a couple weeks ago. I went and rubbed one, it is a bit hard but does flake away if you scrub it, which is what my friend did before. They are back again. Refer to picture. Just a chance...

So seems my year subscription is up. So OK, I'll just renew. But not so fast. I click on the button to renew subscription, I get a message asking if my phone has gone fishing. I try several times, same issue. Phone is connected to internet and has no problems with connectivity. I log out...

I've been looking at Hayward OEM and best price I've found is $475 (for T-15 cell), so perhaps there are better prices to be found on the cell (anyone find it for less?). I've seen some lower prices on the generic/compatible. Anyone have feedback (good or bad) with using a generic/compatible...

I have two spots in my pool that have a leak from behind the tile in the grout line. The pool builder attempted to fix this by putting some kind of sealant in the grout, but didn't work. Pool builder is saying it's calcium leaching through the grout. His suggestion was to scrape the area out...

This morning I noticed that my control box was flashing a "low flow". It was not a consistent flash, flashing perhaps 10 times or so, then a pause, then flashing 10 times or so again. Continued to do this. I powered off the salt system and then turned it back on. The "low flow" was no...

I'm thinking that if I know the FC and CYA there should be an expected % of FC consumption. So I was wondering is there a formula, chart or other reference tool that gives the expected FC loss relative to FC and CYA level. I know there is more to it with the amount of sunlight/UV, but expect...

First, yes, I know I need to SLAM and I am in the midst of it again. However I want to figure out just what may be eating my FC as I just completed a SLAM a month ago. UGH Results were looking good as I've summarized below: I completed a SLAM on 7/27, passed the OCLT. Turned my SWG back on...

Is it possible for algae growth to be in the algae pipes on my sheer descents or bubbler? Everything has been looking good in my pool, water sparkling and SWG operating at reasonable level (35%), generating about 3ppm per day and FC was holding steady. And then a couple days ago I noticed that...

I managed to find this, sounds interesting that device in your pool would be able to test and report FC, pH, Salt and temp. Appears it's not available in the US. Anyone seen anything similar for US? Home - Ondilo YouTube video: ICO - My smart pool partner - YouTube

I have LED pool lights. Pool Builder installed a wireless RF remote switch that worked, but the default setting when power is restored is "on". With frequent power flickering in my part of the country that means the light keeps being set to on, which is OK except when I'm on vacation for a...

Short story - in preparation for vacation I cranked up my SWG output just to ensure FC wouldn't be low. Upon return my measured FC was below what I had expected. SWG cleaned and passed the Hayward testing, it's all good. Long story - I went on vacation this time last year and left a pool...

I've noticed that my initial read of pH is coming up low, the color is more yellow and tests about 7.2 - 7.4. I know my pH is not that low, so I retest. Using same water source (I pull water from pool in cup) the 2nd read shows what I expect it to be (7.6 - 7.8, or higher). This does not...

Despite crystal clear water, pool being in a screen enclosure and CYA of 70, I was seeing a drop of 8FC per day. So I went through a 3 day SLAM. Started SLAM the morning of 7/23, started with adding about 3 gallons of 10% chlorine (target 28FC). Checked water every hour or two and dumped in...

As I understand, your salt cell should be sized for twice your pools capacity. I have T-9 for my 13,000 pool and finding that with days of blistering sun the cell produces just enough FC at 100% (roughly 8.0 FC/day). With your size pool you'd fall short on extreme days. Stick with T-15.

I had posted this in the "Testing and Balancing" forum, but cross posting here for any other eyes on what I may have overlooked as to cause (apologies in advance if this violates one of the forum rules). For the past week I've noticed that the chlorine level dropping. I've increased the SWG...

For the past week I've noticed that the chlorine level dropping. I've increased the SWG Output from 50%->70% and then even at 100%. CYA level is at 70. Despite the increased SWG output the chlorine level has dropped. A bit of background: I had test levels on 6/14, at the time the chlorine...

Pool was completed last year. I noticed this small area (about inch wide) that has this brown (rust?) poking through the blue pebble finish. PB looked at it and cleaned it up last year. Well, it's back again this year. This is only area in the pool and brushing with pumice stone will make it...

Almost 3 weeks on vacation and came back to pool that is clear. The pH was high at 9.0 but I expected that as my pH is always increasing. The FC also dropped from 5.2 to 2.8 even though SWG was set to 55. I had expected it to hold steady or be slightly higher than when I left. The only...

Pool installed last year. Most of the pool tile looks fine with exception of these two spots. I've tried scrubbing these areas with pumice stone and it helps to clean it up. But continues to come back, even during really​ dry winter. Tile line remains clean so don't think this is scaling. Is...

I've been maintaining my pool with SWG since it was completed last year. I've been relying on the readout from my SWG system (Hayward AutoRite) but have been reading messages where the K-1766 test was more accurate. I purchased the kit (only $20 delivered). The results were the test kit...

The shades of red at the upper scale don't seem to be easy to distinguish in Taylor test kit for pH, and readings don't show anything above 8.0. My pool seems to naturally want to level out on the higher end (due to recent build/plaster and SWG). Trying to keep lower just ends up a fight in...

I'll be on vacation for 2 weeks so looking for input on best way to manage PH while I'm gone. Here's the background: Build on my pool was completed in July. I have SWG as well. From my reading of articles and forum here I know these are both working against my PH. I'm constantly lowering...

Just had Hayward AquaRite AQR installed after problems I had with AutoPilot Digital Nano system. When PB installed the new unit he went over the diagnostics. After problem with AutoPilot I want to keep an eye on the new SWG to be sure it's working right. I checked the diagnostics today and...

I was just wondering why the Pool School Recommendation for CH is so much different for Bleach vs. SWG for plaster pools? It's basically the same for other pool types, but pretty different for plaster pools (250-350 for bleach vs. 350-450 for swg). My pool is in enclosure and adjust the target...

I checked my AutoPilot today and found that the volt/amps reading was 13v 3.1a. Salt level is 3400, temp 85, amperage 696/hr. I had thought that volts should be higher 15+ and that amps should be 5+. Is the current level considered acceptable or should I have PB look at the unit?

PB had been maintaining the pool, I've been at the wheel for past couple of weeks. Read through the Pool School articles and read through the various forums, I hopefully can navigate the maintenance without major issues. I have a question though as it comes to Chlorine / CYA Chart. I have a...

Pool has been set-up now for going on 2 months. I have an MX6, connects into vac port on the pool. We also have an enclosure so we have no leaves and other outside debris to be concerned with (only leaves are from potted plants in the enclosure area). I've read the various pool school...

I have a Hayward EcoStar Variable Speed Programmable pump, pool only set up for 2 months. PB set pump up to run at 2750 RPM (12 hours). The unit displayed it was using 1243 watts. I throttled it down to 2500 RPM, it was much quieter but also noticed that it reported using 950 watts. The lower...

Just had AutoPilot SWG installed on my new pool. PB installed while I was on vacation, he checked and verified all was working afterward. When I returned from vacation I saw the display had "Boost On". Thinking the PB had set it to help raise chlorine level I checked the chlorine level and it...

Hi - Newbie here with a pool build that's about 2 months underway. Screen enclosure measured and hopefully installed this week (fingers crossed) and then the final finish and we'll then have to maintain the beast. Found this forum to get educated on what I've got myself into. We had AG pool...