Never combine concentrated pH Up and pH down. Never add water to acid, only acid to water. Do not store acid (pH up) and bases (pH down) in the same area. Do not consume or allow pH up or pH down to contact your skin.

Secondly, what is the best pH for hydroponics? With a pH of 7 being neutral, such as with pure water, values below 7 are acidic and those above are alkaline (or basic). For most commonly grown hydroponic crops, an optimal pH range is between 5.5 and 6.5.

Considering this, why does my pH keep going down?

When the plant consumes these acidic nutrients, the natural reaction is a rise in pH. This means it is normal for your reservoir to have a natural pH up-swing. pH goes down, EC goes up = Plants are putting nutrient into the water rather than taking them out. Nutrient levels are too high.

How important is pH in hydroponics?

The ideal pH range for most hydroponic crops is between 5.5 and 6.5. How does pH level affect plant growth? pH is important because it affects availability and absorption of several of the 16 atomic elements needed for plant growth. Maximum absorption of these elements is found at pH readings 5.5 to 6.5.