OK. Just hold the low chlorine (1 - 3 ppm) and moderately low pH (7.0 - 7.4) and run your filter as much as you can. Dose with the polyquat ever 3 days. As soon as you get the K2006, post your results.

I hadn't realized you had a DE filter, till I inserted your signature just now. That means it's unlikely the problem is algae, since live algae stops up DE filters very quickly. With copper pipes and low pH (below 6.8), you may have very high copper in your pool water. Testing may, or may not, reveal that. If it is copper, the solution is
1. stop adding it -- keep the pH above 7, so you don't dissolve any more copper from your pipes.
2. keep it dissolved so it doesn't stain the pool -- use HEDP
3. remove it using the CuLator packs.

If it is copper, there's a good chance simply adding HEDP will turn your pool to near-blue. But even though HEDP is often marketed as a stain remover or metal remover, that is NOT what it does. HEDP just keeps dissolved metals dissolved, and helps prevent chlorine + higher pH from turning the dissolved metals into stains.

To actually REMOVE the metals, you either have to use the CuLator product (a special water-softener type material) OR you have to filter the metals out. But, to filter them, you have to precipitate them -- make them UN-dissolve, and turn them into particles . . . OR stains! The CuLator is a LOT easier, since it can 'take' the metals away from the HEDP. The downside of the CuLator is that it works slowly, and you have to use HEDP the whole time, to prevent the metals from staining.

Anyhow, you can wait till you have your test kit, so we can do some more checking to verify that it really is metals, OR you can go ahead and order both the HEDP and CuLator paks, so you have them waiting for you, and ready to use as soon as we're sure. I'll put links below, so you can go ahead, if you like.

Ben

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HEDP is a liquid phosphonate that is pretty chlorine stable, and very good at keeping dissolved metals IN the water, instead of ON your pool surfaces. It can lift recent stains, OR it can be used along with ascorbic acid, to keep the metals in the water, after the ascorbic acid is consumed by chlorine.
Jacks Magic The Pink Stuff 1qt (60% HEDP) @ Amazon
20% KemTek HEDP @ Amazon
The CuLator product is a special patented plastic material, contained in a bag that goes into the skimmer, that can slowly take metals OUT of your pool water. We think it works, and have some evidence that it does, but not proof yet. (Not likely to be available locally.)
1 ppm Culator @ Amazon
1.5 ppm Culator sold by Amazon, shipped from Periodic
4 ppm Culator sold by Amazon, shipped from Periodic
Poolmaster 16242 Poolmaster Skimmer Basket Liner @ Amazon (to protect CuLator from being damaged by scum)