For the Regular and Advanced kits, does the nutrient solution need to be replaced during the growing cycle?
As the plants grow, the level of the nutrient solution in the reservoir will lower primarily due to plant respiration. (Since by design our Regular and Advanced Floating Gardens are covered, evaporation of nutrient solution is minimized and most water loss is by plant respiration.) As the liquid level drops, you should periodically add plain water via the fill port to bring the floating plant bed up until the black plastic sheet is even with the top edge of the water reservoir. As water is used, the floating plant support bed sinks, and when water is added it rises to the initial level in the reservoir when it was first filled. Simply observing the level of the planting bed affords an easy way to see when you need to add additional water/nutrient solution to your reservoir. As a rule of thumb, for long cycle plants such as tomatoes, after you have added a total of three quarts of water over time, you can empty the reservoir and replace it with fresh nutrient solution. Generally, for pl
