The 2HR Aquarist APT Zero 1 Plant Nutrition, 300mL

Compared to conventional fertilisers (largely developed pre-2000s for ‘fish tanks’ with simpler / hardy plants):
3X more concentrated for demanding species*
2X more potassium for richer colours^

Dose 3ml per 100L daily.

Our Standard 300ml Pack comes with a calibrated pump. 1ml per press.
Lasts ~3mths for a 30 Gal / 115L tank.