How much to dose

[Country joe]

I have two tanks a 200 litre and a 70 litre, I do a 25% water change weekly, the only two liquids I put in the tank after water changes are, Catappa liquid, and plant fertiliser, do I just dose both tanks for 200 and 70 litres, or as its after taking 25% water out, use smaller amounts.

 

[MaloK]

There's no chlorine or chloramine in your water supply ?

I would use dose only for the water changed for the catappa extract and fertilizer. then add more fertilizer later if required.

The problem with fertilizer is that it is difficult to know exactly if it's consumed completely between doses. So I have a tendency to go on the lower side to avoid any buildup.

 

[Country joe]

There's no chlorine or chloramine in your water supply ?

I would use dose only for the water changed for the catappa extract and fertilizer. then add more fertilizer later if required.

The problem with fertilizer is that it is difficult to know exactly if it's consumed completely between doses. So I have a tendency to go on the lower side to avoid any buildup.

Sorry yes, I use a large plastic bin for my water changes, I fill the night before, and put in a heater, , when changing I dose the bin with Prime.