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I'd say it was around 1 cup of DE added - enough to get a 1PSI rise on the filter as per the how-to here. The thing that makes me wonder if this is a filter issue or not is that I'm not seeing any signs of filter sand on the bottom of the pool, so every time I start to think this might just be...

Filter issues? That’s ultimately what I’m asking. And what I suspect it is - however, in the interest of not assuming, I’m working here towards ruling out other possibilities first but I’m not sure people are reading the entirety of my posts and replies before jumping to conclusions based...

Just checked... FC is actually nearly 6. Has been hovering in the 4-5 range consistently in the last 2-3 weeks. Need to turn down the SWG clearly. CYA is admittedly low, but with a FC of 6 (and never lower than 4-5 in the last several weeks) I know the pool and it's use well enough to be able...

It’s absolutely not algae, like I said, pool is crystal clear, liner not slippery anywhere, etc. I’m very familiar with all the signs of algae issues and this is not it. I tried to take a photo however it didn’t attach for some reason. The debris collects in little ripples on the bottom of...

So, for about a year now I have been having issues with persistent fine silt building up at the bottom of my pool. I can vacuum it up, but a day later it’s once again right back where it started. On a few occasions I’ve vacuumed to waste which solves the problem, however given it’s only a...

Just to put some closure on this thread, I’m happy to be able to report that a month in now and things are running like clockwork. Salt level in the pool is higher than I’d like (you can certainly taste it on your lips now) but it’s not a biggie in the grand scheme of things. Thanks for...

Last 24 hours things have run perfectly. I think flipping the cell was the last piece of the puzzle.

Just flipped the cell, and sure enough it made a significant difference - instant read out (with everything else including the pump RPM) went from 2100 up to alternating between 2700/2800, so let’s say 2750. Did a recalibrate (since the average has slowly slid south to the point where it was...

I haven't flipped the cell yet and I'm pretty sure what you were describing is the issue - at low RPM on the VSP the cell has a lot of air trapped in there versus water. When I observed instant vs average salinity a few days ago when I first noticed this problem the pump speed had a huge...

Spoke too soon, on the overnight filter cycle it only completed one cycle last night and clearly errored out on the second 2. I'll flip the cell today.

If you read back through all the replies longevity of the pumps internals even with straight chlorine didn’t seem to be a problem.

Well, I may just leave well enough alone - I increased the RPM settings just marginally on the VSP and now the salt system is working absolutely perfectly - here’s the electrical signature from the last hours. It cycled through its duty cycle 3 times overnight with no unexpected gaps...

Aha! It is indeed hump up right now. Will flip it tomorrow morning and do some more testing and report back again. Because of the location of all my equipment and the configuration of all the valves and such I'm pretty limited to only one spot for the cell so horizontal was the only option...

So, here's the latest update. I've noticed that with low flow on my VSP the sensed salt level plummets and the SWG falls into "salt too low" mode. I have the pump set to run an 8 hour very low speed filter/stir cycle for 8 hours every night and it seems like there's no way at all I'll be able...

Pool place salinity came back at 3800ppm. Wasn’t totally evident what system they were using but I’m pretty sure I saw a digital tester versus anything reagent based. Really questioning that result. Headed for a second opinion from another place shortly.

And yes, the jumper has been opened and the power cycled many times. It’s setup to match the on/off filter and solar cycles on the pool pump.

Do not have that kit, and honestly, At between 80-$100 for that kit up here, it’s unlikely something I’d be willing to buy for the once a year I’d be using it. I know test strips are discouraged but FWIW the ones I have are pretty much on par so far as measurement results with the system in...

Ok, follow up. The T3 cell has now been hooked up for 6 days. The PPM display has settled down to 2200ppm and the “Inspect Cell” and “Check Salt” lights are on solid. From the very low amp draw I’m seeing on the unit (I have a lot of home automation and have the unit hooked up to a...

Thanks all - system seems to be churning along happily now. I'm going to leave things as-is for a few days as we're leaving for a small vacation and I don't want to rely on my son to keep an eye on things. If it runs trouble free for the next 2 days then I'll feel pretty confident it's going...

Also, the manufacturing date of 2016 on the T3 I bought used for $200 does coincide with the story the seller gave me, so I'm led to believe that indeed he did buy it not realizing it was far too small of a cell for his pool and he only used it for a brief period before realizing his chlorine...

Thanks all - as always TFP is a wealth of information! Excellent news @JamesW, Glad to know that I can probably actually use the T5 I bought now, although if the T15 continues to operate is there any reason I shouldn't use it until it dies and save the T3 as a spare at this point? If I just...

Salinity has been checked both at the local pool store (I’m a BBB guy and only go there for full tests and parts) as well as strips here at home. Both shows I’m in the 3200ppm range right now. I wouldn’t normally be that high but the old Intex system was constantly complaining about low salt...

Serial number on the old T15 cell....which FWIW is coming up on about 30 minutes of operation so far and is still running well. Serial number on “new” T3.

Sorry for only partial pics (unit is operating on a test run as per my last response so I don’t want to shut it down right now) but I’m pretty electronically savvy and know what I’m looking for....so low and behold I have 2 jumpers marked J7 and J4.

Thanks mguzzy. I've spent the last few hours scouring the internet to try to sort things out before posting here (I hate being *that* guy who needs to be spoon fed stuff readily available online if one just made the effort) but the manuals one can find online are all over the map, 99% of them...