I recently purchased the Growee system to add to my cannabis grow setup. I Run the PH balancer and nutrients system. I run the GH 10 part system and do a 100% water change weekly and refill once empty from a bulk tank that is mixed just before with RO water. I have 4 nutrients spaces and I know I shouldn't add the armor si or Calimag as the water will already have nutrients mixed in and will lock up. So I was curious what I should use as the 4^th so I reached out to GH and received this response

“Good morning, unfortunately this system is going to be useless with a multi part advanced formula like the Flora Series. the issue here is that you cannot dose into a reservoir already containing nutrient solution.

Doing so outright ignores the fact that items must be mixed into solution in a certain order, and anytime you are adding EC to your reservoir or system, it must be conducted by using an outside reservoir with properly mixed solution to top off the system.

While they seem cool in marketing, these systems are not at all compatible with products like our Flora Series, no matter how many parts used beyond the base nutrient series.

Nutrient solutions have a lifespan of 1 week, it is quite simple to keep nutrient levels within range during this time without the need for dosing at all, the same with your daily pH monitoring.

Thank you”

I should have reached out before purchasing the Growee system and modifying my system to work with this set up. I am curious if anyone knows of a nutrient brand that will work with this system to keep everything in the correct zone for the plants. Or if you have the Growee system and use GH nutrients.

I am a new grower and before I would test my water before and after changing and the ppm would start at lets say 1500 and when I would empty it would be down to 100. Maybe I am still wrong on how I do things and that fine with me as I am still learning and trying to do the best that I can. I will list my process below for as much info as possible and if you have any questions please ask.

I used to run 3 photo plants (down to two to try and grow larger and test some ideas)

I started my plants in wet paper towel and transfer to rockwool in a AC Infinity tray.

Once they are ready I transfer to my 4 X 4 AC tent and follow the GH aggressive feed chart.

I have a home RO system and mix the water in a bulk tank with a 800 gal/hour pump mounted to the side to mix my nutrients. I always use armor si then wait 10 minuets add calimag and wait another 10 minuets then the remaining nutrients required that week.

I change the water weekly and top off the water with RO water and follow 18 hours of light then to 12 hours.

I’m wondering instead of topping off with RO water if I should top off with extra nutrient water?

I apologize for the long post but want to make sure I cover all the items that you could need to answer all of my questions or anything you can answer or offer your ideas. I will keep updating the post when some questions about the system.

Thank you all in advanced for all of your help and happy growing!!