Originally Posted by Hypancistrus
If you just "dump it in," how is it dissolving? It just seems to me that it's going to sink to the bottom and a good portion of what you dosed will settle in the substrate.
Depends how fine the powder is, how much you are dosing in one go, strength of water current, temperature of the water, and probably, the tds value of your tank water.
I have tried dry dosing, and I feel that for me it isn't practical as I find it takes a few seconds for the substance to dissolve and I don't want that near my curious fish!
The best thing to do if dry dosing is to try and get the powder as fine as possible and to put little bits in at a time, slowly and directly into the path of the filter outflow, so it gets immediately mixed round the tank. Once happy it's dissolved, add some more and so on.
Personally, I find it easier
to pre-mix the dose, not as a stock solution, but with a little tank water to get it initially dissolved into a concentrated solution, which is then completely added to the tank.
This works for me as I weigh the compound directly into a small bottle on my scales, then add the water, shake up (in same bottle) and I'm done, ready to dose into the tank.
My tanks are relatively "small" (see signature), so this remains pratical for my situation.
99.9% pure, ball milled KNO3
which is excellent at dissolving.
99.9% pure KH2
, which is good at dissolving, but could be ground a bit further into fine powder.
Commercial, off-the-shelf Sulphate of Potash, which is a pain to dissolve, partly due to the amount I add, but also because it is far from "fine" and contains irregular lumps of compound, which if not careful and get into the tank, will remain on the tank floor (waiting for a hungry inquisitive fish!).
Moral is; you pay for what you get basically. If you want to make life easiest, go for the 99.9% pure, fine powdered versions of compounds. (which I think is what Greg Watson sells
Whilst I prefer the quick pre-mix option for my tanks, I by no means state this is better
than any other method. Do what works for you and your situation..... ignore the "do this" opinions, it's a process of learning.
If you have many tanks, it's probably better to make a standard stock solution to which you dose to all tanks in different amounts.
If you have one large tank, which occasionally gets dosed, dry dosing would probably be better.