TaylorR-0012-C, Hardness Reagent, 2 Ounce, for Testing Calcium Hardness in Pool and Spas, Dropper Refill for Water Test Kits, Replace Annually | Made in The USA

No issues here!

Thai is the reagent that gets used up first in the test kit. So this is a good value buy since it 2oz instead of the .75oz that comes with the kit

I've been using Taylor pool testing products for a while now, having found that test strips just weren't doing the job. I trust these products because in the years I've used them I've never had a quality problem. I buy the bulk sizes as refills for my Taylor test kit and have been very happy with the results.

Refill for .75 ounce in kit

larger size for frequent testing

Much cheaper than the pool store, and the expiration dates are well out in the future.

I have been using Taylor testing chemicals for about 5 years now combined with tests at Leslies. The 2 results are always very close.The larger bottles are better value and I checked with Taylor Technologies who confirmed that the drops from the larger bottles are no different in volume than those from the smaller bottles that you find in most Taylor testing kits.I do not replace the chemicals every year, I do it only if they run out or the results from the 2 different testing sources vary considerable.I've used many different types of testing systems over the many years we have had a pool and found Taylors system to be the very best.

Keep in mind that chemical age so don’t keep them too long and don’t keep in the heat (like Houston)