Injector for fertilizer
 

I want to get an injector for fertilization and I was wondering what I should get. I am tired of the hozon mixer. I looked at the minidos, should I get the 1% or 2.5%?

Any help would be appreciated.

Whichever one you get, you can just adjust the feed concentrate to match your target feeding rate- I'd personally go for one that uses less water and make the stock a bit stronger, but you may have different preferences - also, if you have to make the stock so strong that it won't dissolve right, then you should go for the 2.5% - do some back of the envelope calculations to work it out :)

Wally, I just installed a new Minidos about 6 weeks ago, and while either version will be fine, I opted for the 2.5% model because it can handle stronger proportioning.

My old pump was fixed at 1:128 (1 ounce per gallon), and I noticed that with some fertilizers - even though they were below their solubility limit - I'd get a precipitate in the concentrate tank after a while, meaning that what I thought I was feeding was wrong. My new pump is set up to deliver 1:67 (about 2 oz/gal)), so I can cut the concentration in the tank in half, which solves the precipitation issue.

Yes, I have to refill the concentrate tank twice as often, but it's a 15-gallon drum, so that's about 960 gallon of final fertilizer, so it's not THAT often.

Minidos
 

I am using the Dosmatic Minidos 1%. The 2.5% is also good. I will probably buy a second unit and I am debating which to get.

1% MiniDOS
 

After a bit of thought I expect that I will stay with the 1% unit (1:100 to 1:500) when I buy a second unit but this is because I will use the units to feed a 2 part concentrate to avoid solubility problems. In one concentrate tank I will have potassium nitrate plus phosphate, sulfate, borate and molybdate and in the other concentrate tank I will have calcium ammonium nitrate and magnesium nitrate along with iron, copper, manganese, zinc and cobalt.

If I were going to use a single tank concentrate system then I would probably go with the 2.5% unit (1:40 to 1:200).

These minidos things are really expensive. Is there a cheaper alt for those with smaller but automated collections?

I decided that I did not like the minidos or microdos. I could not get them to meter reliably under my conditions.

I have gone to watering from a 10 gallon tank. I use an electric pump to supply the water to my spray nozzle.