Growth Technology – Ph Up & Down 1L Pack – Hydroponics Aquarium
The best pH for a nutrient solution when growing plants hydroponically are between 5.8 up to 6.2.
The concentration is 81%. which is very strong so handle with care. Some other products on the market are considerably weaker so check the concentration before you buy. This is a very dense liquid and should feel much heavier than water.
Growth Technology pH DOWN contains phosphoric acid (H3PO4).