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Update, I replaced the lateral assembly and the sand. So far we've vacuumed once and had no dirt blow back into the pool. So, good news!

Bought it from Menard's two years ago. I don't remember the brand other than it was labelled as pool sand.

I don't believe the stuff blowing out is necessarily sand. I believe it's dirt that was picked up by the pool vacuum. Whether or not it's algae I can't say, but the pool chemistry is good and the water is clear, except for when the bottom gets stirred up by vacuuming attempts or the return...

I have a two years old Hayward S210T filter on a 28ft AGP with a recurring problem of dirt bypassing the filter when we vacuum. I replaced the spider gasket assembly which didn't help. Then I deep cleaned the sand which didn't help. Finally I removed the lateral assembly and found a crack in...

Before I did this, I looked around for possible complications of using rain water. The only thing I've noticed is that it dilutes the chlorine in the pool, and (as previously mentioned) there's a possibility of debris from the roof washing in. The pH seems pretty much unaffected. Are there any...

Nope, no filter. I have never found any significant debris from the roof in there, but we live on a dirt road so the pool gets vacuumed quite a bit anyway.

We live in the country and have struggled with iron (0.16ppm), manganese (0.298ppm) and high alkalinity (399) in our well water. Every time I added chlorine the water would turn green. I was spending $200-300/yr on the Pink Stuff. It worked, but it was expensive. I tried filling the pool with...

Gauge is broken this year but if I remember correctly it ran around 16 or 18psi and never increased more than 2psi even when its dirty.

If I put a smaller hp pump on the same impeller assembly, will the motor just run slower (at full speed) to give me less flow through the filter? Does the resistance slow down the new pump, or will it run at full speed and still give me the same flow, which is too fast. Just want to make sure I...

We have a heater that came with the pool but I've never hooked it up. Filter problems have kept me distracted. Is a 1hp 2-speed pump appropriate considering we might want to use the heater some day?

This is what I have tried so far: deep cleaned the filter, twice disassembled the filter, dumped the sand, examined the laterals for cracks, replaced the sand replaced the spider gasket I just checked the pump specs on Hayward's website. The SP1580X15 is rated for 91gpm! (depending on head...

I've always had a problem with dirt blowing back in the pool when vacuuming. Essentially the filter never clogs, it just blows dirt right through. The filter is a Waterway Plastics - Clearwater high rate sand filter 22" rated for 55gpm max. The pump is a Hayward SP1580X15 which says 70gpm on...

Thanks, I will do that.

The filter seems to plug rather quickly and then starts blowing dirt/silt back into the pool, starting the problem all over again.

No, I haven't finished the SLAM yet. I was just pleased that we are making progress. There is still a bunch of dirt and debris in the bottom of the pool... we vac to waste until the water level is too low, add water and bleach, then let it settle overnight and do it again. Today might be the...

Success. The water is clear. We can see the bottom! It still has enough dirt on it that even vacuuming like I was, blind, I missed a lot. Now that the bottom is visible, we'll just have to vac to waste a couple of times to get it cleaned up. And... the water is barely tinted green any more! I...

Eventually I will be done with SLAM (hopefully!). Remember I already put in four of Robelle Mineral-Out and four Jack's Pink Stuff. I've had to add a couple inches of water twice to replace what's being lost to backwashing so there is un-sequestered water :) or whatever you want to call it in...

I have been keeping FC above 18. It's been getting a gallon of bleach every morning and evening. Current results: FC 18 (right before I added another gallon) CC 0 (finally!) CYA 50 The filter is 22" diameter and takes 150lbs of sand. I put new sand in this spring. I'm backwashing about every day.

I've been slamming. The water is less bright green, slightly more grey. Not much change in color but there definitely is a change. I am concerned that the filter might not be working properly. I put two nylon knee-highs over the skimmer basket and that caught some fine debris. Since the nylon...

Okay, I started SLAM last night. Is that related to the color of the water or for swimmer comfort? Could you clarify (no pun intended :) ) why it's important. Robelle suggested lowing the Ph and Chlorine both before adding product so that's what I have been doing. Thanks.

Well, things aren't working out so well. Last year I used Jack's Pink Stuff and had clear water. This year I tried Robelle Mineral Out and had no success. After dumping two bottles, I called Robelle and they suggested two more. That didn't help. I ordered four bottles of Pink Stuff and put two...

Thanks for the link - that's helpful. Yeah, we've had some 'windblown debris' out here lately! Perhaps you've heard about the storms that rolled through Blair earlier this week. Amazing weather! Another storm went through last night (not severe) and I'm again vacuuming green leaves out.

Is this algae? This pic is from yesterday after vacuuming. There was much less today.

We have well water with iron in it. I'm having a tough time knowing whether I'm still fighting algae or if I have metal staining going on. I've been SLAMing, keeping FC > 14. Current results: FC 18 CC 2.0 CYA 35 TA 150 PH 7.2 when I started I vac the bottom once a day and always get some...

Attached is a pic. The pipes 2" and are short, one intake and return. No heater or anything else. The pump is an SP1580X15 and the filter is a 22" round sand filter with 150lbs of sand in it.

Is there any way to know if there's a problem with my filter?