What CO2 drop checker should I buy?

[Riiz]

I strongly suggest Greenleafaquariums.com, I bought my last 2 drop checkers from them for $20 each, the extra money I spent is well worth it for the following reasons: 1. I'm buying from a trusted US site, a store with well-documented excellent customer service and I got it in 3 days from florida and I live in Cali. 2. It came with enough 4kDH solution to last a couple of years or more. Nuff said...

 

[fabsroman]

What do you guys think about the Red Sea CO2 indicator/drop checker? Is that complete garbage?

 

[Bk718]

In that ebay ad from the UK, the directions state to use the solution and then add some water from the aquarium to it. Is this a correct method?

Bk828;
whats not accurate about the drop checker is the solution/directions it comes with.
1- the solution is a weak ph reagent
2- directions tell you to use tap water

replace the following
1- with a good API ph reagent
2- with a 4dkh solution

Other than that the drop checker is just fine though you can find a cheaper one

.

 

[The Rockster]

It's simple to make KH water. A little baking soda + Distilled Water & a KH test kit.
green=4 dKH water=30 ppm
5 dKH water=40 ppm
6 dKH water=45 ppm
Note: The real indicators are your fish.
Red Sea Drop Checker:
Pros: Cheap; Made of Plastic; white background to contrast color of solution
Cons: Pain to open

 

[Jag1980]

What do you guys think about the Red Sea CO2 indicator/drop checker? Is that complete garbage?

I got that one and it seems to work just fine and is nice and small.

 

[DAVIDFBT]

I don't have a GH/Kh test kit yet, but I will get one tommorrow to make sure that the mixture really is 4kh. Thanks for your help everyone.