Thanks for the response. I figured you must have had a pretty good system in place based on the thriving plants in the picture. I was thinking of just using clear water in a 55 gallon rain barrel for my main water storage, but I like your idea of compost tea in the barrel. I am not a very good gardener, but I have had my best success with the sub irrigated planters with a water reservoir on the bottom. That way the plants drink up what they need and I am not over or under watering the plants. Also, I know some plants require much more water than others, so a connected sub irrigated container system to eliminate that problem for me.
Here is a picture of an elevated sub irrigated planter I have out on my deck off the kitchen. I grow beans in that planter because we enjoy picking fresh beans off the plant and eating them for supper. I have 4 inch perforated drain pipes in the bottom of the planter with an overflow hole drilled in at 3 inches. So, there is 3 inches of water in the reservoir when full and always a 1 inch air gap in the top of the drain pipe which prevents drowning of the plants. It works great for me because I don't have to worry about how much I need to water the plants. They take what they need from the reservoir and I only watch the fill tube indicator to refill the planter as needed.
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I built that 2 foot X 4 foot X 16 inches high planter myself a number of years ago for about $50. I imagine it would cost 2-3X more in today's lumber prices. So, I am looking into less expensive container gardening but connecting the containers together to create a similar sub irrigate system in each container.
This year, I will be trying out cardboard boxes lined with heavy trash bags to make my containers. I think it might work. I got the idea from this YouTube video...