Salt system - bubbly haze from returns

[Jodester]

Okay, here's an update.

I tested the water this morning (it's been running since about 1:00 am with the heat on), after having superchlorinated it beginning Wednesday afternoon (it would have finished some time early in the day yesterday). The chlorine levels are FINALLY at the high end of normal - around 3 ppm. TA has continued to come down slightly to 150.

The bubbly haze is less than it was, but still noticeable on the shallow end. I'm developing a new theory. I may be crazy, but I swear my sand filter sounds different -- noisier. When I look at the sight glass over the valve on the return pipe -- located BEFORE the water enters the SWCG -- there are air bubbles. I wonder if the guy made some adjustment to the sand filter fittings or something and that somehow air is getting into the system somewhere in there. Could this, combined with the natural "carbonation" that occurs in the SWCG itself, be what's causing this haze??

-- Jody

[mas985]

You might have additional air getting sucked in from the suction side of the pump. You can usually tell by the air in the pump basket.

[Jodester]

Okay, more weirdness. A few hours later, I no longer hear the water movement noise coming from my filter, the sight glass by the return valve is clear, and there is no more bubbly haze at all!!

As a side note, why would my readings and that of the Leslie's store for TA consistently be discrepant? They use the same reagents as I do (I use Leslie's), right? This morning my 150 was read by them at 100. This has gone on for years. My reagents were just bought this year, too. ???????

--Jody

P.S. I never saw any bubbles at the pump basket.

[mas985]

Just curious, did you check to see if the SWG was off at the same time the bubbles disappeared?

As for the testing, some pool store employees could really care less about doing an accurate test so it wouldn't really surprise me that they get a different results. Some stores actually use test strips which are not very accurate at all although they have this fancy machine to read the color. TA should be one of the more repeatable test if they are using reagents and if they are then perhaps their reagent is bad, assuming of course yours is fresh.