I recently went to a local hydroponics store to purchase some
nutrient for my garden. While I was there, I noticed a bottle with
what looked like calcium on the bottom amongst the various nutrient
solutions. I talked to the owner about it and he mentioned that
some of his concentrated nutrient feeds come as two parts and that
they cannot be mixed directly with each other while in concentrated
form. If the concentrates are mixed directly, the nutrients
precipitate out as a solid.
If you are using a nutrient mix that requires two or more parts
(or if you are mixing your own nutrient solution) remember to add
part one to the water reservoir first, ensure it is dissolved and
then add the next part. Don’t mix concentrates together before
diluting – they are packaged separately for a reason!