ok, so I have a discrepancy in alkalinity test kits.
Red Sea reads 9.2 dkh
Hanna checker reads 8.1 dkh
Basic question is Which do I trust?
Background:
Red Sea and Hanna were both within a tenth of each other. Then I ran out of Hanna reagent. When I used a new Hanna reagent bottle, alkalinity went from 8.8 on 7/29 to 7.6 the next day 7/30. That was odd so I retested with the Hanna and got 7.5. Red Sea read 8.7 on 7/29 and then 8.4-8.7 the following day on the 30th.
I contacted Hanna and they told me I was storing the reagent at too high of a temp ( high 80's to 90's, when it should be below 77 degrees). They kindly sent me a new bottle. When I checked today the old Hanna reagent read 8.2 and the new reagent read 8.1. Red Sea read 9.2 today.
So it looks like the new Hanna reagent is in line with the old Hanna reagent, but they are one dkh off of the Red Sea. I'm not sure which number to go with. Please share your thoughts.
Complete story:
Red Sea
7/29- 8.7
7/30- 8.4-8.7
7/31- 8.1-8.4
8/1- 8.1-8.4
8/2- 8.1
8/3- 8.4-8.7
8/4- 8.4-8.7 Added 18 frags
8/5- 7.6-7.8 10% water change and started dosing 2 part
8/6- 8.1-8.4
8/7- 8.7-9.0
8/8- 9.2
Hanna:
7/29- 8.8 reagent #1 ran out
7/30- 7.6 retest 7.5 reagent #2 assumed it was defective
7/31- 8/6 no test done
8/7- 8.1 reagent # 2
8/8- 8.2 reagent #2 8.1 reagent #3 (newest reagent bottle just received today)
Red Sea reads 9.2 dkh
Hanna checker reads 8.1 dkh
Basic question is Which do I trust?
Background:
Red Sea and Hanna were both within a tenth of each other. Then I ran out of Hanna reagent. When I used a new Hanna reagent bottle, alkalinity went from 8.8 on 7/29 to 7.6 the next day 7/30. That was odd so I retested with the Hanna and got 7.5. Red Sea read 8.7 on 7/29 and then 8.4-8.7 the following day on the 30th.
I contacted Hanna and they told me I was storing the reagent at too high of a temp ( high 80's to 90's, when it should be below 77 degrees). They kindly sent me a new bottle. When I checked today the old Hanna reagent read 8.2 and the new reagent read 8.1. Red Sea read 9.2 today.
So it looks like the new Hanna reagent is in line with the old Hanna reagent, but they are one dkh off of the Red Sea. I'm not sure which number to go with. Please share your thoughts.
Complete story:
Red Sea
7/29- 8.7
7/30- 8.4-8.7
7/31- 8.1-8.4
8/1- 8.1-8.4
8/2- 8.1
8/3- 8.4-8.7
8/4- 8.4-8.7 Added 18 frags
8/5- 7.6-7.8 10% water change and started dosing 2 part
8/6- 8.1-8.4
8/7- 8.7-9.0
8/8- 9.2
Hanna:
7/29- 8.8 reagent #1 ran out
7/30- 7.6 retest 7.5 reagent #2 assumed it was defective
7/31- 8/6 no test done
8/7- 8.1 reagent # 2
8/8- 8.2 reagent #2 8.1 reagent #3 (newest reagent bottle just received today)