Opinion on CO2 drop checkers

[Jeff1192]

I'm considering getting a CO2 drop checker. My kH is really high (12) making the whole kH/pH method of measuring CO2 pretty unreliable. I have been reading on Tom Barr's site about these and I'm wondering if anyone has much experience with them? Are they worth it?

I found this one on Big Als site

http://www.bigalsonline.ca/BigAlsCA/ctl3664/cp18056/si1317851/cl0/redseaco2indicator

Thanks,

Jeff

[charlie]

The key for them to be accurate, is for the  solution to be spot on 4 DKH, adding tank water as suggested by red sea is not accurate, 4 dkh solution can be made or bought on line, personally i would buy it on line since making it would require some access to accurate lab instruments.If you do a search on Tom Barr's site there is a ton of info on this subjct , as well on other planted sites.Maybe we can get a group order for 4 Dkh solution 
http://mralgae.blogspot.com/2008/02/how-drop-checkers-work.html

[charlie]

Here is a source for the soloution
http://www.greenleafaquariums.com/co2-drop-checkers/kh-standard.html

[Jeff1192]

I'm going to inquire about ordering some. Let me know if you're interested. I'll find out from them how much shipping would be and I can let everyone know.

Jeff

[charlie]

I would be in, here is a nother source for larger bottles
http://liquidarthome.net/khstandard

[zima]

I'll be into ordering as a group as well - I use drop checkers all the time, but keep forgetting that my tank water is not anywhere near 4dkh! Please let me know if there's group order brewing.