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would phyto lumen mean the same as lumen?? eks. looked at 2 bulbs one says 400w 56000 lumen the other 400w 58000 lumens - 128.000 [Phyto-Lumens]

im in the process of buildning op a new hydro system, and the next on my list is a revers osmosis system, but was wondering, is the ph easier to hold stabil with ro water than without??? i should put in that my tap water has a ph of 8,5 and holds alot of salts.:leaf: thx nexxus