Raphael
Member
The rule that has worked for me and at Lucas' recommendation is 50 gallons of water per 1000w of light you use. The idea is that the girls start drinking up so much water in a day that the EC and ppm rise unless you have enough water to satisfy them. Are the res' auto topped off like always at a full 16gallons or do you top off weekly or?
I would personally drop a 50 gallon res under each of the nft tables if possible and have a 500gph pump in each of them for a total of 100 gallons of water in the res, because you are running 2000w, correct? If not, definitely go for that ratio of 50gallons per 1000w.
If you can't put a 50 gallon res under each table, another viable method would be to get two rubbermaid trash cans that can hold about 20 gallons each when about 3/4 or 3/5 full so that they don't deform. That will get you to 36 gallons per 1000w if I am understanding your setup correctly. A 2-300gph pump in each of those res' plumbed to the nft tables will solve your ph swinging problem and will allow further time between res flushes. I personally don't flush until harvest week.
Cheers !
I would personally drop a 50 gallon res under each of the nft tables if possible and have a 500gph pump in each of them for a total of 100 gallons of water in the res, because you are running 2000w, correct? If not, definitely go for that ratio of 50gallons per 1000w.
If you can't put a 50 gallon res under each table, another viable method would be to get two rubbermaid trash cans that can hold about 20 gallons each when about 3/4 or 3/5 full so that they don't deform. That will get you to 36 gallons per 1000w if I am understanding your setup correctly. A 2-300gph pump in each of those res' plumbed to the nft tables will solve your ph swinging problem and will allow further time between res flushes. I personally don't flush until harvest week.
Cheers !