UPDATE: May 5th 2024 Update – The results for Week 3 have been posted in a reply at the bottom of this post. Kindly check the link provided for more information.

Hi – this is off topic for my music production, but it is also a hobby of mine.

I have pretty good luck now with Spinach, Chard, Lettuce in my indoor hydroponics setup. I had a lot of help along the way, so I want to give back a little. Honestly I don’t know how useful this will be in general, but it is an experiment to test the readings on my old meter vs my new meter and the measurements are in line with what Advanced Nutrients says to use for their Micro, Grow, Bloom products.

On May 5, I emptied out the mixed tank. I will use this to test out growing carrots hydroponically – should be a gas!

I’m going to share all my measurements from week one and week two of my current grow.

Here are the two meters I use – the gray one is the old meter and the yellow is the new.

I have 8 tanks I am using and these measurements show the values for each meter function for each tank. This is followed by an averaging of all 8 tanks.

Here is week one measurements – I used advanced nutrients measurement of 1 ml per liter of water for each of the three liquids (Micro, Grow, Bloom) – My go to measurement was the old EC MS reading of 2.7 for this mixture. The PH was maintained pretty well without having to add any PH UP or DOWN.

The average of all 8 tanks at the bottom indicated that the new meter reads approx 17% lower than the old meter. If my old meter dies, I have a good idea of what to set the new one at.

The following is the table for week 2 – Advanced nutrients suggests 2 ml per liter for each of the three liquids.

You can see from the averages that the meters are still different, this time by approx 15%. That’s close enough for me.

I hope these measurements help you out. They are working very well for me. I’ve been at this for about 3 years and finally feel that I am getting good results.

Feel free to leave a comment and I can provide more information.