do any of the LFS on Oahu sell 4dKH solution? aquascapes said they don't. ironically they sell the red sea drop checker which comes only with pH regent. not very useful without the 4dKH... idk if the ADA drop checker they carry comes with solution but $50 for a piece of glass is stupid.
so yea. anyone found it locally or just order online? thanks
It's easy enough to make your own if you have a digital scale. That batch will last you a long time. I got mine from sumoregulator.com about a year ago. They sell 250ml bottles and I have more than half of it left. I change the reagent in 2 dc probably every month or so.