Testing CH? Necessary?

[kris77]

Is it necessary to constantly test my calcium levels since I have a vinyl ABG? I know its a big deal with a plaster Inground.

How often is recommended for an ABG? Once a month? Every 2 weeks? Every week?

 

[tado921]

CH not a factor in vinyl pools. Maybe check it once or twice a season if you are interested, other than that I wouldn't worry about it.

Well...don't let it get too high if you use cal-hypo or something like that.

 

[zea3]

You should test at the beginning of the season to make sure you have at least 50 and not more than 250 ppm of calcium. If you use cal-hypo then you should test bi-monthly to make sure you stay under 250 ppm. If you have very hard fill water you will want to check after you add water from the tap and if it climbs over 350 ppm keep the pH 7.0-7.2 so you don't develop scale.

 

[svenpup]

Low CH is not an issue for a vinyl pool, but high CH can be an issue for any pool. +1 to Tado921's position of a few times per season. If it is high you may want to measure more often to keep a handle on it and determine if any action is needed (drain/refill or maintain low pH)