i use the 27 gallon hdx.the sides are bowed a little.what size is your bottom container going to be?that will affect how much the volume res will be filled.your air gap decides how much you can fill the volume res.i am using 5 gallon buckets for my bottom container so i have more height in my volume res.when i used the 3 gallon rough neck totes for top and bottom ,my 27 gallon hdx tote was not filled very high at all.that is why you see in d9 pics that he has more totes linked together.if your floor is not level,you will need to adjust the container height to get your air gap right on some plant sites.i have used pieces of plywood underneath the plant sites to get my levels close.
no problem painting the vent black now.
if you were meaning the bulk res for 27 gallons,i would go bigger.i am using a 40 gallon barrel for 4 plants in flower and if all 4 plants are big it will be empty after 6 or 7 days.i am using a 40 gallon barrel in veg for 8 sites but i never have more then 4 bigger plants and the others smaller.that will barely make it a week also.
no problem painting the vent black now.
if you were meaning the bulk res for 27 gallons,i would go bigger.i am using a 40 gallon barrel for 4 plants in flower and if all 4 plants are big it will be empty after 6 or 7 days.i am using a 40 gallon barrel in veg for 8 sites but i never have more then 4 bigger plants and the others smaller.that will barely make it a week also.
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