i like to keep my plants on the drier side... actually i rarely have runoff or just a bit... right now im in 2 gallon bags (ocean forest) and water each with about a cup of water/ day... sometimes more, sometimes less... i like to gather a feel for the water uptake (different at different stages of the plants cycle) and be careful not to let them wilt (dry out)... if adding water for the slower ones to catch up i never use nutes... only feed every other "main" watering... a good rule of thumb (for me, anyway) is ill weigh out mentally the weight of a dry plant to one with about a cup and a half of water and find a balance in between... this promotes root growth as the roots swell seaching for water