Dosing instructions, do they mean tank or new water?
The Instructions on my bottles always read more or less the same thing, add 5ml per 40ltr of aquarium water. ( some miss out the word aquarium )
Do they mean as i have a 130ltr tank add 15ml ish to my 20ltr water change, or as it's 20ltr going in, 2.5ml??
On my older 20ltr tank i just went with the 2,5ml on my 5ltr changes as i thought it won't hurt, and the bottles still last ages.
And does this change with the chemical? do some mean total volume, some change volume depending on if it's stress coat, zyme, or the PH Buffer?
Just for interest it's a AquaOne 620T using the hood filter upgraded to 1000ltr power head, with an external filter also rated at 1000ltr good for 180-250ltr tanks.
One thing i learnt with the old 20ltr is you can't beat filter capacity, that tank ran at about 10% volume filter, mostly because as a river tank i needed somewhere for the flow and huge pump to go, filled the volume with balls, foam and other bio type things.
This tank is about 10 liters worth of filter.
Currently finishing the cycling with moderate planting, an apple snail, 7 red cherry shrimp and a black molly fry that jumped in the bag with the shrimp.