Replied. Thanks!PM sent
Replied. Thanks!PM sent
Yes! Every week the ALK kept getting lower and lower in the 7.0 to 7.3 range but my trident would say its not that low but I would add Alk to raise it and recalibrate the trident. I only figured it out because when I bought a new bottle it was high. So I tested with salifert and red sea and they were high. As I calibrate my trident with my tank water for controlled dosing I was telling the trident the ALK was lower so as controlled dosing does... it did. Now every week the trident and hanna are off by maybe 10 points if that. I havent gotten a low reading ever since.Did you find that there was noticable drift in your Hanna checker kits before you stored them in the fridge?
I would just lower it slowly. It took its sweet time to get there now let it come down nice and easy.Unless your alkalinity is 16 dkh. Then it's probably fine to lower that alk.
So you store it in the refrigerator? New unopened or just once opened? How long has it stayed stable in the refrigerator?Yes! Every week the ALK kept getting lower and lower in the 7.0 to 7.3 range but my trident would say its not that low but I would add Alk to raise it and recalibrate the trident. I only figured it out because when I bought a new bottle it was high. So I tested with salifert and red sea and they were high. As I calibrate my trident with my tank water for controlled dosing I was telling the trident the ALK was lower so as controlled dosing does... it did. Now every week the trident and hanna are off by maybe 10 points if that. I havent gotten a low reading ever since.
Once I open it, it goes in the fridge. Next time I have to test I open the fridge door shake the bottle about five times open the bottle measure out the 1ml then close the bottle and put it in the fridge. I have done that with the last five bottles. I don't know if something was wrong with the previous reagents and maybe hanna secretly fixed it but keeping it in the fridge has given me the best readings. Unless somehow down the line something changes in how Hannah makes that reagent and keeping it in the fridge will actually cause the reagent to not work properly or if keeping it in the fridge is not necessary I don't see myself not keeping the reagents in the fridge.So you store it in the refrigerator? New unopened or just once opened? How long has it stayed stable in the refrigerator?
Probally a good reminder that stability is more important than target number chasing
Yeah I get that I was just saying that the hanna checkers are in my opinion not that reliable. Nothing about number chasing.Probally a good reminder that stability is more important than target number chasing
Appreciate your snotty comment thoughProbally a good reminder that stability is more important than target number chasing
Well, I noticed my corals were looking a little...off. Checked my dkh...7.5. thought of this thread. Broke out the new bottle of alk reagent..10 dkh.Yes! Every week the ALK kept getting lower and lower in the 7.0 to 7.3 range but my trident would say its not that low but I would add Alk to raise it and recalibrate the trident. I only figured it out because when I bought a new bottle it was high. So I tested with salifert and red sea and they were high. As I calibrate my trident with my tank water for controlled dosing I was telling the trident the ALK was lower so as controlled dosing does... it did. Now every week the trident and hanna are off by maybe 10 points if that. I havent gotten a low reading ever since.
I just run a salifert test. That's good enough for my needs. When I get a new Hanna reagent I test with salifert and compare. Usually off but very little and can be because I didnt catch the color change. Then the Hanna goes in the fridge.Well, I noticed my corals were looking a little...off. Checked my dkh...7.5. thought of this thread. Broke out the new bottle of alk reagent..10 dkh.
Storing mine in the fridge from here on out...
Is there an alkalinity standard or positive control that we should be using?
My assumption is that the reagents are going bad, not that there is huge batch to batch variation.I just run a salifert test. That's good enough for my needs. When I get a new Hanna reagent I test with salifert and compare. Usually off but very little and can be because I didnt catch the color change. Then the Hanna goes in the fridge.
Cool! Thanks, I will check it out!You can try Randy's methods to make an ALK standard.
https://www.reef2reef.com/threads/diy-alkalinity-standard.714738/
I always check. There's always a new thread on r2r with reports of bad reagents.My assumption is that the reagents are going bad, not that there is huge batch to batch variation.
Good point.I always check. There's always a new thread on r2r with reports of bad reagents.
Happy my issue helped someone else! I also agree it is most likely reagents degrading with time and not batch batches.Well, I noticed my corals were looking a little...off. Checked my dkh...7.5. thought of this thread. Broke out the new bottle of alk reagent..10 dkh.
Storing mine in the fridge from here on out...
Is there an alkalinity standard or positive control that we should be using?
Sounds like we both need a Trident.Happy my issue helped someone else! I also agree it is most likely reagents degrading with time and not batch batches.
Since storing in the refrigerator my tests have been very consistent.
Since my alk has dropped into range my corals have started to grow again and consume more alk. I am slowly starting my AFR dosing.
Good to be back on track!
I was getting results that were unreliable for Alk and Ca and I replaced the batteries and everything is consistent again.Hi All,
Just ordered a new Hanna test kit for my alk tester and it's WAY off from my current lot.
Current lot 7.1dkh
New lot 16.1dkh!!!
Multiple tests back to back. Now have no idea what is right. Corals all look solid so no indication there.
Looking for someone local to Franklin for a quick alk test just to clear it up for me. If anyone could help it would be super appreciated!
Thanks!
Great...I was getting results that were unreliable for Alk and Ca and I replaced the batteries and everything is consistent again.