Do I have metal problems?

[sw_stupid]

I guess it could be, but how do you know? When I went to the pool store at lunch to have the water tested for iron, she said it is time to change the sand in the filter. (she said every 2-3 years) Oh no!!!

[sw_stupid]

Well, I did the Vitamin C test on my steps. I definitely took the stain away. This means it's metal, right (pool store said it didn't have any)? I added a bottle of Metal Magic and brought my pH down to 7.2. Is it possible that the stains will lift just by adding that? I still have a lot of "stuff" on the bottom of the pool. I think they are two different problems. Can I bring the CL up to shock without affecting the sequesterer? I've read where high CL can make the metals fall out of the water. I guess I need to clear up the water before I address the metals? Any direction would be greatly appreciated.
Thanks,
Brad

[mbar]

As long as you put enough sequestering agent in the water, and bring your ph down to 7 - 7.2, you should not get any more staining out of the water. It is important to put in enough sequesterant - more than what it says on the bottle, according to the amount of water in the pool. I think just by using enough sequesterant and lowering the ph, it should take the stains away, since there isn't any on the vinyl liner. After you see the stains lighten, I would take the chlorine up to shock, very slowly, about 2 ppms at a time. The chlorine should help break the "stuff" down, so it can filter out. You can also put a trichlor puck in the skimmer basket if you have a sand or DE filter. Another good idea is to get a skimmer sock, or cut the leg off pantyhose or tights - put the foot in the basket and leg around the basket. It will help to catch the really fine sediment. Hope this helps, keep us informed.

[waterbear]

There is a reason the pool store did not find metals in your water. It has already stained and precipitated out as sediment. Get as much of the sediment out of the pool before treating the stains in case it is iron oxide otherwise it will redissolve in the water.

[sw_stupid]

That makes sense. I guess I could have them check my fill water, but I know it's metallic b/c the Vit C test. Anyway, I guess I will try and clear up the water (which now looks like a pond) first and then address my stains. Could the pool store lady be right? - change my sand every 2-3 years?. It just seems like the sand would continue to filter if you keep it backwashed.
Thanks again to the forum.

[mbar]

You don't need to change your sand. The only reason to change sand is if it isn't filtering - because it is gummed up. To clear your water, you will need to put in sequestering agent - more is better than not enough, keep your ph at 7.0, raise your chlorine to shock levels according to the "best guess chart", run your filter 24/7 - backwash and brush, you can also put a skimmer sock on the skimmer basket to help catch small particles - if you still have sediment in the water you may want to vacuum to waste.

[waterbear]

That makes sense. I guess I could have them check my fill water, but I know it's metallic b/c the Vit C test. Anyway, I guess I will try and clear up the water (which now looks like a pond) first and then address my stains. Could the pool store lady be right? - change my sand every 2-3 years?. It just seems like the sand would continue to filter if you keep it backwashed.
Thanks again to the forum.

As far as changing the sand...it is possible that metals have deposited on the sand as 'stain'. If they have they can redissolve in the water given the right conditions. I would inspect the sand and look for evidence of staining. If there is a lot of it I would change the sand..otherwise I wouldn't. A commercial sand cleaner might also be an option to remove the metal stain from the sand if it is present. IF the metal has stained the filter material it is a good thing...it mean that you can actually remove them from the pool easily! Ideally, you want the metals to stain the filter and not the pool for this reason.