Blackwater setup with low KH

[amazontank]

Hope everyone is doing good!
My pleco tanks KH is very low but the PH is normal.
Should I add seeded crushed coral?
I do massive water changes to keep PH normal since there lots of wood in the tank.
Any advice would be appreciated.

 

[Rocksor]

How many german degrees is your KH?

 

[amazontank]

Hi thanks!
It's looking like below 20 wiyh the color chart showing light green.
PH 6.8-7.6
20 percent water change every other day with a high PH of 8.4 water source.

 

[Rocksor]

Hi thanks!
It's looking like below 20 wiyh the color chart showing light green.
PH 6.8-7.6
20 percent water change every other day with a high PH of 8.4 water source.

A KH of 2 degrees will certainly experience a lower PH if you weren't doing water changes every other day.

What is the PH of your water source, after you have it sitting in a cup for 24 hours? I suspect the high PH is only because you are testing it directly out of the water source rather than letting the water settle and give you a true PH reading.

What fish are you keeping?

 

[amazontank]

Yes I have been testing from the source that's good info I'll check that ?
Keeping yellow chubby and L204 plecos there pretty messy.