Hello mate , the alien system is the nuts. I?ve the rdwc xl 8 pot system. In a 2.4 x 1.2 tent I couldn?t afford the pro one. I?ve been using it for a year now and I?ve only had one blocked pipe, the pro system has bigger pipework to stop this happening but that?s the only benefit I can see with it. My first grow in it took 99 days for a phot period plant and done autos in 75 days. If your planning on growing massive plants then it maybe worth getting the pro but the tent dictates the size u can grow to so unless u got money to burn then the xl with 30 litre pots will do fine. I pull about 30 oz per run.
Don?t forget to add in costs for a chiller with the 8 pot system you?ll want at least a hailea 150, a 250 if u can afford it. I?ve got the hailea 500 which is over kill. You will need ec and ph meters. I use a blue lab guardian , again a bit pricey but so convenient. Expensive set up but it delivers the goods every time
If your using led then monitor temps as u may need a heater if the water is staying cold
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