check my numbers

[drdrool]

Moved in to a new place 2 weeks ago and with all the stuff to do around the house the pool did not get my attention at first, so a little bit of mustard algae popped up. Grew up around pools, so know the basics and when there is trouble brewing. We had a basic test kit and there was very little chlorine in the pool. Reading up here (thanks all!) I ordered the TF-100 immediately. But, before it came I tossed the chlorine pucks out and put some bleach in to hopefully stop the algae (along with a ton of brush downs). Chlorine, running the filter, and brushing took care of the algae and I quickly got to the point where I wasn't losing any chlorine overnight. It has been great for a few days now.

Got the test kit and did a full test last night:
FC 2.5
CC 0
PH 7.5
TA 120
CH 100
CYA 55

Based on that I added the pool math number for bleach last night. This morning I tested chlorine again and it was spot-on. Correct me if I am wrong, but the only thing I need to address is the calcium, right?

Love doing things myself, cutting out a pool man makes me happy. Thanks to the contributors here all my questions have been addressed in old threads, a tremendous resource!

 

[woodyp]

Yep, calcium looks like it could use a boost and your TA is a tad high. Your PH may be more stable at a lower TA.

 

[JoeSelf]

CYA 55 I would use 60 for my number. Pool School - Chlorine / CYA Chart shows target of 7 not to go below 5. I would target higher 8-9 and see what happens during daylight hours to dial in target.

 

[drdrool]

got it, thanks all.

That FC reading was at 8 pm after a hot and sunny day. I added chlorine last night and it was up to the 7 level - tested again before 6 am and lost nothing. I will test again this afternoon to see what the numbers are. It was my first time with the TF-100 so I have a feeling there is a learning curve with the CYA test ... as the directions say, "it may take a couple tries to get it."

Much appreciated, I have guests with kids coming over this weekend and one myself (till #2 is here in December) . Time to see some smiling kids in the pool!

 

[Boburk]

I am sure you have this figured out now...but with a CYA of 60...if you are chlorinating to 7, and falling below 5 during the midday sun, you need to raise your target FC level. You don't want to ever fall below 5 at your CYA.

Sean