add more CO2 gas slowly going down by 0.1 pH units per week till you see optimal new growth and fish and livestock are fine.
This is the tweaking stage.
You can adjust by eye only using a drop checker.This is more dicy for newbies and pros alike. I'd rather be able to measure it relative to the pH.
It may not be exact, but relative to a starting point, it's far more accurate than anything else we have to work with.
In several months, I'll have a device that addresses the issue and you can avoid the whole KH issue like the Drop checker does, but it'll respond in 60 seconds and will be accurate to about 1 ppm.
Should run about 50-100$ or so.
I've been using only that blue liquid in my drop checker, without any kH4 water or anything else. Does it still show correct results this way?
I've no idea, it's either this one:You need to find out if your DC fluid is pre-mixed 4dkh with Bromo blue ph indicator. If you are just using Bromo blue then no, it needs to be in a 4dkh solution to be working properly.
These are not pre-mixed solutions. They are just the typical Bromothymol Blue pH test reagent. You will need to mix them with distilled water adjusted to 4 dKH via a carbonate-only source.
You can use bicarbonate of soda (NaHCO3), but you need to buy the bromothymol blue pH indicator. I haven't used them, but "kitchen-chemistry" on Ebay sell bromothymol blue pH indicator.So where can I buy 4dkh water from besides eBay???
<"This one">.There is a recipe for it in the link from darrel
cheers DarrelI'd use 6g of NaHCO3 in 500cm3, which is a 400dKH stock solution. You can store the 400dKH solution in a stoppered bottle for as long as you like.
If you take 5cm3 of this stock (which I'd weigh as 5g) and make it up to 500cm3 (500g) with DI, you have a 4dKH solution, to which you add a drop of <"bromothymol blue">.