Oh i didnt think about that but good idea do u use one ?
Better to buy it or diy ? Did you know some good product ?
And how much time you need to change charcoal and all other fee ?
the growshop I usually go at has some simpler 3 stage filter for plant watering that doesnāt trash water and is a lot fasterā¦
tomorrow I can get Infoās if u like
DS
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For an outdoor i help with we use a single stage charcoal and it is great. For part of my indoor i use tap with a handful of compost to rid the chlorine and chloramine(sp). For the rest of my indoor that is bottle fed i use ro. I donāt have any recomendations for brands. I donāt know what is best and your research is probably better.
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It would be very nice to know all spec and brand and price also the recommended maintenance schedule and fee associated
Anyway ty Dee and Ryasco for your input good idea for my project and next project 
Stay safe grow hard and stay tuned for next update 
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