New 234 Test Results vs. 233 Test Results

Just got my new 234 kit! I love new, everything's so clean, no DPD residue on everything! So, I was trying to decide what 'old' reagents to keep and decided on a side by side test to compare 'old' vs. 'new'. Here are my results:

New PS234:
FC = 19
CC = 0
TC = 19
pH = 7.8 - 8.2 (I have a little trouble distinguishing the pinks)
Alk = 100
Cal = 280
Cya = 40
Temp = 90

Old PS233:
FC = 10.5
CC = 0
TC = 10.5
pH = 7.2
Alk = 110
Cal = out of R-0010, last reading was 300
Cya = 40
Temp = 90


My biggest changes were in the FC and pH readings. This concerns me because of something I have have been trying to experiment with, as described in this post, http://www.poolforum.com/pf2/showthread.php?t=1097 . Rather than bothering myself with 'are the new reagents good', I am going with the safe assumption that the new kit is fresher, and my old reagents are aging. I thought my old reagents were fairly new, nothing older than a year. From now on I will make a copy of the reagent life chart, http://www.poolsolutions.com/kit/ps2...gent_life.html , and put in the dates I received the reagents so I will know if I need to renew. Sounds like annually is a must for the DPD FC test, but who would have guessed on the pH test? And it was off by a large amount.

In conlusion, anyone else who has a leftover PS233 may want to test the reagents before deciding to keep the old ones.

Hope this is of value,

Mike

Don't throw anything away yet.

I'm very interested in those readings. I'll have to book mark this and get back to it later this weekend.

Ben
"PoolDoc"

did you note the drop size. I read that some of ps234 drop tips were giving out small drops instead of large ones. That might account for the FC seeming so high. PH I have no idea, but I seem to read about .4-.6 lower on my 223 kit than my pool store does.

I have kept the old reagents, if you're still interested, Ben. In the meantime, should I adjust the pool based on the new reagents or the old?

Also, I have been cleaning the tip prior to testing. I believe this was the stated solution to possible problems with the drop sizes.

Thanks,

Mike