Time to replace sand?

[PoolDoc]

@ Goose
Skimmer Socks at Amazon

@ Jonno, others
Coral Chemical's Green to Clean is just ammonia!

Instead of ""Disodiumsalt of ethylenediaminetetraaceticaciddihydratediammoniums ulfate", which is Fred Luth's attempt to obfuscate what he's selling, the chemicals should be listed as

Ethylenediaminetetraacetic acid (EDTA) ?%
Ammonium sulfate ?%

OR

Ammonium sulfate EDTA 100%

Regardliess, it's mostly ammonium sulfate, which is an industrial waste product that I have bought in 100# bags for about $10 a bag! (I do think they are using a somewhat purified version, that may cost more than $10 cwt.)

Coral Chemials -- used to be Coral Seas -- is a one product company, like United Chemical. But where United Chemical sells sodium bromide, mixed a bunch of different ways, Coral sells ammonia, blended 2 ways: "Green to Clean" and "Yellow Out". I encountered Fred Luth at an NSPI trade show years ago, and thought he was going to jump down my throat when I asked him if "Yellow OUT" was just ammonia.