We often recommend the 6-way kit because it has a CYA test in it and can often be bought locally whereas the K2006 seldom can. But it is usually suggested as a stop gap and not in place of the K2006 which can measure FC up to around 50ppm and also CC.

SWCGs are extremely pricey which is why most people don't buy them.

Keeping a cover on the pool does reduce chlorine loss.