essentials

Hey guys , hope you're all having a good day . Can someone please tell me all the essentials to build a grow tent ?I wish to grow for personal use and i dont use more than a gram a day , also we are able to grow only up to 4 plants. Thanks :D ,

Hi, not a complete noob but I'm having ph problem I have a homemade rdwc with 85l but with a 45l pot, the ph of the butt is 5.8 but the ph of the pot is 4.4... why does this happen when the water is the same and recirculating Also the ph is 5.8 while the pump is running but if I turn the pump...