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Welcome aboard! I too am still learning and working to improve my SIP skills.
My previous grows I always kept the res topped up and never really top watered
I will let the res dram down this time just to provide more oxygen to the base of the soil.
This is in order to reduce any anaerobic or acidic conditions that might be caused or exasperated by having the res always full
I hope that not using the mulch cover will also have the same effect
Interesting thread! I am absolutely in love with my Earthbox and very happy with my grows, so I will share my experience so far:
Earthboxes work best if they are used as described on their homepage. Use peat based soil, fill it 1-2 inches above the rim, cover it with plastic ... that’s the best way to keep this system running, because level of moisture is perfect from top to bottom, microbes can do their work and break down the food. The „wild root grow“ is exactly what you want to archive. Roots are getting enough oxygen, believe me.
Main problem: we growers! Try to keep it simple and you will have great results and less issues. I‘ve observed a lot of Earthbox grows and in 9 out of 10 cases, the results aren‘t as good as they could be. The 2 reasons are:
1. Wrong setting (uncovered, wrong cover, dry res., ...)
2. Overdoing it (mostly in terms of a too frequent feeding)
Keep it a simple as possible ... maybe it‘s boring but the plants will thank you. My plants get a dry grow amendment which I work into the soil a couple of days before seeds are planted and I water it in with some goodies (ben. bacteria, fluvic and humic acid, mycorrhiza). Every other week I top water a bit more than a 1/4 gal (same goodies). At day 35 (+/-) a dry bloom amendment will be carefully worked into to top layer and watered in very slowly, this time using 1/2 up to 3/4gal water containing the same goodies as described above. I use peat based soil and I mix RO with tap water, ec=0,3. Never experienced any cal-mag def or other issues. A bit of silica may be a good idea if growing organically, but that‘s all what is needed.
By the way ... some people recommend to keep res halfway full ..... the water level doesn‘t have any consequence to the medium‘s level of moisture at all, that‘s physics. It isn’t necessary to keep it full all the time but don‘t let it get/remain empty.
Cheers and happy growing!
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