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The pool has not been drained recently as far as I know. I certainly haven't drained it. My calcium readings seem to be within normal ranges. I'm not sure if the spots are rough to the touch, but I'll check it out. It's odd though, because these started showing up earlier in the year and...

I dont know. The home was built in 97, and I moved in last year. I'm not sure if the pool was put in when the house was first built, or added afterwards. It's pebbletech, but are you thinking that it might be wearing through? Is that rebar we're starting to see show through?

I'm sure. They were there a few months ago, and more are popping up here and there. I have the high-res file, but can't post here. If you think that would help, I can post and link.

Sorry this took me a few days to get to the full tests. So the Vitamin C tab just seemed to wear down from the surface (I believe it's pebble tech) and didn't do anything to get rid of the spot. Here are the results of my test today: Free Chlorine - 1.5 Total Chlorine - 1.5 Salt - 3000ppm...

Over the past 6 months, my pool has begun to develop spots. These sports are at the bottom of the pool, in both the deep end and shallow end. I do not have any items falling in the pool (coins, nuts, etc.). I get the regular leaves, but I have a Hayward pool vac that runs daily. I've tested...

Thank you very much for your help on this. It ended up being the filter. I dont understand why, since I just cleaned it 3 months ago. I did add some chemicals to remove phosphorus and add conditioner (at different times) which I've read can clog the filter, so maybe that's what did it. In...

Thanks for all of your help on this. What's the best way for me to check this? The pipes right out in front of the pump look fine, and at the skimmer look fine. Obviously checking in between will be difficult. Would I need to open up the pump to check the impeller? It has a strainer basket...

For the rest of the plumbing, I did replace my old salt cell with a new one, and Jandy moved from a 2 port to a 3 port cell, so some minor plumbing rework was needed, but nothing outrageous. I don't believe the suction line is clogged, at least I don't see how that would have happened. I...

I don't. I know the filter pressure at a lower speed, 1900 RPM, and it's the same now. But are you saying that's not relevant, and I should be comparing pressure only at full speed? If that's the case, I wouldn't know, and I guess all I'd be left with is the choice of cleaning the filter...

I should have mentioned, but the filter pressure is fine. It's at 10psi, same place it was at after the cleaning. The filter itself is a DE filter, and about 10 years old. I'm not sure if that matters or not.

Hello, I recently installed a pentair VS pump. After a bunch of tweaking, it seemed to be working pretty well. I have an Intelliflo spreadsheet that shows the relationship between wattage and flow, and all seemed well. But not I have an issue. I took various wattage readings during my...

It bores into the pipe so that I can join it properly. Otherwise I think I'm stuck.

I have 11 inch straight in front of the pump. I actually re-did what was there because there were several 45 degree bends with only 2in of straight pipe in front of the old pump. Long story short, the pipe coming out of the manifold from the ground was a bit tricky to work with as there was no...

At full prime, I see very, very small bubbles. At lower speeds, for example at 1600rpm, a larger air bubble forms (or sometimes two large ones). If I look closely, I see what appears to be very tiny air bubbles coming in through the intake of the pump. At 2500rpm, there is noticeable bubbling...

I'm not sure I understand completely. When you say full prime should occur, what should I expect to see as a result? Are you saying there should never be a large air gap in my pump basket? And I'm not even seeing light debris sucked into the skimmer, so I'm likely going to spin this up a bit...

Thanks. Are either of these straight from Pentair, or is this info that individual dealers put together? In any case, between the two versions, I'm only off 1-2 gpm on the estimates. I'm thinking that I might need to start focusing on the heater as the problem. Before I do though, a couple...

Maybe that's my first problem. I'm using v 1.4 of the spreadsheet, is there a newer version? I didn't change anything on the calibrate tab. I'm not sure what LS A, HS A and HS B are.

Just to follow up again, I've been watching the reading at 1000rpm for a little while now. It was reading in the higher 140s for wattage for awhile, then at 131 (bringing it to about 21 gpm, which makes more sense to me), next reading at 157 watts, then 163. I'm not sure if it should be...

The heater fires up, rattles and shakes the pipes, then shuts off. Then it tries again about 15 seconds later. Also, not sure if this helps (or makes sense), but I ran through several speeds on my VS pump and inputted the numbers into the Intelliflo spreadsheet. The numbers I'm getting...

My old pump wasn't that large. It was a Pentair Whisperflo 4, 1HP. I'm not sure how much water that would have been pushing, although I would like to know. It seems a bit coincidental for my heater to have a problem just after I replaced the pump. I did have an issue with the bypass on the...

Hello everyone, I'm a bit of a pool noob but I'm trying to pick up and learn as much as I can. Just this past weekend, I installed a new Intelliflo VS pump to replace an aging single speed pump, and most everything works just fine. I seem to be having an issue with my heater, and I'm concerned...