used the old water and added new water to the 24 litre tank, done another test and it's down to 0.5
BRAND NEW NEVER OPENED NEVER USED!
"EHEIM Quick Vac Pro Automatic Gravel Cle ...
Everything is brand new, tank only lightly used
for aquascape. I purchased a larger tank for my
Offering a beautiful blue and yellow damsel.
Approx. the size of a gold dollar coin. He's
being a b ...