First of all, is this a single site system you have built; or is there multiple sites creating a recirculating DWC system. Secondly, the amount of air is dependent upon (3) principles: the amount of water in each module or the system entirely, the temperature of the water i.e. colder water carries a greater amount of dissolved oxygen, and the last rest upon if you creating a super aerated environment with large amounts of air being pumped into your water, and a highly aerated media such as expanded clay pellets; then your nutrient levels should be adjusted accordingly. More oxygen and greater circulation requires less nutrients. However, one must take into account if a "greenhouse" controlled type environment with CO2 proper humidity levels, temp levels, and large amounts of HID lighting is also being used then the plants will obviously require or be enabled to uptake more nutrients. I will advise you in this department to great effect if possible simply your nutrients as much as possible and also ensure you are using only R/O water to avoid pathogens and bacteria in you system. Dutch Master is a desirable line of nutrients due to the fact that they are very synthetic and pH drift is less of an issue. Be sure to check out my post from earlier under the same DWC/Hydroponics tab; chronicling my grow-op in a 256 site/ DWC recirculating system/ 12 - 1000watt/ Platinum OG bubba. I should be able to give more advise as time allows. Enjoy your experience, and as always be sure to document your findings so that you are able to become a master of your new technique.
