Quote:
Originally Posted by dawntwister  I see a lot of simple designs for the drop checkers but I don't see any mention of where to buy the fluid to put in the drop checker. Where do you buy the fluid to put in the drop checker? |
You DIY!
Use distilled water and add tiny-tiny amounts of baking soda. By trial and error, take samples of your water and measure until you know you have a 4 dKH solution. If you use 10ml of water as sample instead of 5, your reading will be more accurate; just divide by two the number of drops you added until the color changed. Once you get it dump the sample you added the KH reagent to, use your solution to add some drops (I like adding at least 7 of bromthymol blue) pH reagent solution and insert it in your DIY drop checker device.
Pepe
Santo Domingo