Fertilized reservoir for automated watering system

Question

I would like to move forward and install an automated watering system for my home plants that grow in growing tent. 
Today I’m watering x3 times in a week, each watering is for 4liters of fertilized water.

So it’s quite a lot of work for me to prepare the bucket each time, so that is my reason to move to automated system.

Currently it is a winter time in my country, so for preparations for such system, I’ve bought: 
1. An aquarium heater to keep the reservoir water in 20-27c degress 
2. Air bubbler to keep the water oxygened and make the solution mixed all time. 
3. Smart sensors for measuring temp, TDS, PH
4. Pump and water pipes.

Growing setup:

Plant: let’s keep it private - one plant in 90x90x160 tent. 
Light: x4 COB CREE CXB3590 - 200W in total. 
Growing medium - Coco perlite mixture.

I remained with the big question, if keeping fertilized water is allowed and if yes , on which parameters should I pay attention ?
The reservoir should be enough for one week of watering.

Thanks,

Polypipe Wrangler · Answer

I have seen nutrient solution stored at final use dilution. It tends to grow algae, but that is not a problem. This should work.

The air bubbler is not needed as mixing is not needed, and has a problem. There is a chance of the warm solution eventually growing Legionaires disease bacteria, and the aerosols produced by the bubbler can be breathed in to give disease.

Graham Chiu · Answer

It looks like you have a soiless grow system. I know that my premade nutrients when I tried this long ago were in bottles A & B because if you mixed them neat some of the minerals precipitated out. But here you're talking about nutrients in a much larger volume of water and I don't think it's an issue because it's the same as growing in an aquaponic solution.

You need some way of measuring plant growth though to see if your watering schedule is adequate. I presume that you're reusing the water as run to waste would be wasteful.

You need some way of measuring plant growth though to see if your watering schedule is adequate.  I presume that you're reusing the water as run to waste would be wasteful.

Fertilized reservoir for automated watering system

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