First test readings of season

[PoolDoc]

A small increase on adding DE would be normal; don't backwash because of that. Instead, wait for at least a 5lb increase. As the pool becomes cleaner, it will take longer and longer to plug the filter. (And that's a good thing!)

[michael3]

Got flooding rains yesterday and this morning, allowed me to vacuum to waste for a good while got water level down to correct level and redosed with DE, visibility is definitely improving, I can look straight down on the side and see more of the liner. Tested water and after all the rain my chlorine was still 15.5, CC 0, ph a strong 7.2 close to 7.4, Alk was 80.

[michael3]

While I wait on the DE to help clear the cloud, and it is slowly. When I tried rubbing the vitamin c on my liner and nothing happened, does that eliminate metals completely or could I have metal in the water but no stains? I'm just wondering if I wanted to add something to my water to maybe help get rid of the green would a sequestrant work or how about polyquat 60

[stma]

I thought that maybe you needed to crush the Vitamin C tablet thinking it may have a "coating" on it's shell...However, I just checked my pool with the tablet alone and the stain came right off..... Sorry Michael !! thought that may have been your issue.... Things are looking a bit better for you, so I have been reading ?? Mine is now on auto-pilot, and the dramatic changes I saw over the weekend have now subsided....it's better for sure, but definitely not what I'm accustomed to seeing...

[michael3]

Same here, I know Ben and everyone said it didn't get this way overnight and it's going to take time. The DE is working, I can see about halfway down but that's still 2' to go. It takes the whole day to build enough pressure to have to backwash, so either it's getting better or the particles are to small for even DE. I want to try either a sequestrant or polyquat not sure which would help better. Lime green wont go away.

[PoolDoc]

You can try to commonly available products to test for metals: Vitamin C (ascorbic acid) and Iron-Out (sodium sulfite + sodium hydrosulfite). If neither one lightens the stains, it probably is NOT a metal stain.

Unfortunately some non-metallic stains can be very chlorine resistant. But, using a sequestrant, chelant, or reducing agent (sodium hydrosulfite -- dissolves metal salts or stains) will have NO effect on a non-metallic stain.

[michael3]

Thanks Ben, I guess what I'm wondering is can I have metal in my water, it would have come from copper shock, but not stain the liner? In effect can metals in the water give the green color but not stained the liner? If so what approach would I take