Following on from our previous blog about problems that can be caused from using hard tap water for your aerogarden…
The water used in aeroponic gardening needs to fall within a certain range of pH and dissolved-mineral content. Most tap water supplies are treated so that they fall within this range and work well with the AeroGarden.
However, most spring, well, softened or very “hard” waters have high dissolved-mineral contents that can cause problems when used in an AeroGarden. High dissolved mineral content or strong pH can interfere with the proper uptake of the AeroGarden nutrient/pH-buffer tablets by the plants, which can prevent or delay germination of seeds, severely stunt growth, and cause “chlorosis”, or yellowing of the leaves. This will be a problem for aerogardeners using tap water from a “hard” tap water area. You can find a map giving a rough guide to locations of hard tap water areas in the UK here… http://www.dwi.gov.uk/pubs/hardness/index.htm#4
So-called “hard” water has a high dissolved calcium and magnesium content, and is the tap water that we get here in London.The high mineral content of the water can cause an excess build up of mineral deposits or limescale that could damage your pump, as well as the other problems listed above.
Most home water filters, do not remove dissolved minerals. They are designed to remove contaminants such as organic solvents and chlorine taste, but dissolved minerals generally occur as tiny ions which are too small to be filtered out. Distillers remove minerals, by heating, vaporizing and re-condensing water and leaving the mineral deposits behind. Pure distilled water works well in the AeroGarden, provided it is within normal pH range.The easiest alternative is probablt to use inexpensive bottled “drinking” or “distilled” (preferably not “spring” but this is ok as long as it has a low mineral conent) water instead, which has a low mineral content is available at most supermarkets. One of our customers, Alex has used Ashbeck Mountain Spring Water, available from Tesco, and reports excellent results with faster growing, healthier plants.If you do use a bottled mineral water in your aerogarden, be sure to do a rinse and refill every couple of weeks to prevent a build up of minerals. Here are instructions for a rinse and refill.
Step 1
Unplug the AeroGarden. Lift the Bowl from the Base and set it on your kitchen counter (or any clean surface where dripping water won’t harm anything).
Step 2
Now lift the Grow Surface, plants and all, out of the Bowl, being careful not to damage the plant roots. Set the Grow Surface on the clean counter.
Step 3
Pour out all the water from the Bowl, and then refill the Bowl to about a quarter-inch below the “Fill to Here” mark. Add two nutrient tablets.
Step 4
Put the Grow Surface, with the plants in it, back in the Bowl, and top it off with water (if necessary) to the “Fill to Here” mark. Plug the AeroGarden back in.
Figure 1 Removing Bowl from Base
Figure 2 Removing Grow Surface from Bowl
Figure 3 Pouring water out of Bowl



