An aquaponics specialist in Hawaii grows hydroponic lettuce in combination with fish through an aquaculture system. One of their organic products, Manoa lettuce native to Hawaii islands, is susceptible to tipburn problem which reduces the sellable product by 25%. Also it reduces growth which results in a smaller crop. The tropical island has warm irrigation water, 75 degree F (23.9 degree C) in the morning and 79 degree F (26 degree C) in the afternoon. This affects plant growth, and they needed to improve productivity and wanted to grow larger and sturdier lettuce, to eliminate the tipburn problem.