Billbug68
Aquarium Advice Addict
I ordered a drop checker off eBay a few weeks ago and it says to mix tank water with the solution. I know this method is out of date, so can someone explain the difference between the solution it comes with and 4DKH solution? Where is the best/cheapest place to get 4DKH? Does one solution show ph and the other actual co2? What's the deal? I could use some explanations, any help would be greatly appreciated!