Sorry if this has been answered elsewhere already, but I was wondering when fert dosing , how soon after adding ferts to the water column, are the nutrients absorbed and used up by the plants? Is it a mattter of minutes or hours? Or is it impossible to measure? Obviously there are a lot of factors involved such as, what type of plants you're feeding, lighting levels etc. Could you in theory dose several times a day? or would that just encourage algae growth? Sorry for all the questions, just feeling inquisitive this morning.