TrueNute Quick Deficiency Guide

In this guide we will cover all the major deficiencies without including pictures. If you need pictures to compare, please see the individual guides.

Quick Guide to Calcium Deficiencies

  • Look for dead brown spots on the fast growing stems of the young parts of the plant or on the leaves.
  • Look for grey to brown spots on the fruit especially on the blossom end of the fruit. BER
  • To correct a Calcium Deficiency we offer several supplements.
  • Calcium Carbonate for when your PH is below 7.0 and you want to buffer it up and
  • Calcium Sulfate, which will not affect your PH.
  • Calcium Chloride that is to be sprayed on and will not alter the PH of your system.
  • Click here to see pictures of some calcium deficiencies.
  • Get the TrueNute Calcium you need by clicking the Icon.
  Calcium Deficiency Video

Quick Guide To Iron Deficiencies

  • Young growth most affected.
  • Yellowing between the leaf veins.
  • To Correct an Iron Deficiency we offer two types of Chelated Iron
  • Iron Chelate 11% for a PH range from 6.0 to 7.5
  • Iron Chelate 6% for a PH range from the high 5's to the mid 9's
  • DO NOT USE FeEDTA as it can become toxic to fish and plants and is only useful up to a PH of 5.5 or so, which makes it a waste of money.

Get the TrueNute Iron you need by clicking the Icon.

Quick Guide to Magnesium Deficiencies


  • Old growth mostly affected.
  • Yellowing primarily between the veins of the leaf.
  • Older leaves turn yellow at the edges, leaving a green arrowhead shape in the center.
  • Dead fringes at leaf edges or brown spots on the leaves.
  • Most affected leaves will start to fall off.
  • To correct this issue, we offer Magnesium Sulfate with no additives. This can be added directly to the system water or sprayed on.

Get the TrueNute Magnesium you need by clicking the Icon.

Quick Guide to Phosphorous Deficiencies

  • Look for a purple color underside the leaves of your plants. Poor fruit production can also be a tell tell sign of a phosphorous deficiency.
  • Watch for spindly growth that is about the correct height, not to be confused with a magnesium deficiency.
  • To correct a Phosphate Deficiency we offer two supplements
  • We have Soft Rock Phosphate in limited supply.
  • We also carry Mono Potassium Phosphate

Get the TrueNute Phosphorous you need by clicking the Icon.

Quick Guide to Potassium Deficiency

  • Old growth is most effected
  • By yellowing between the veins.
  • Plant leaves are cupping.
  • Plants are wilting.
  • Dry or dead edges develop.
  • Cracking or splitting tomato fruits.
  • Tomatoes that ripen unevenly.
  • Check for stunted root growth.
  • To correct a Potassium Deficiency we offer several supplements
  • Potassium Silicate, Best Seller
  • Potassium Sulfate-Added to the system water and
  • Muraite of Potassium-Which is sprayed on
  • Mono Potassium Phosphate
  • Dried 100% Seaweed Extract

These are the major Deficiencies that you will see in Aquapoinics, although we have a full line of other minerals for whatever needs your system may have.