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I have a 50 gallon fish tank and then I cut a 55 gallon plastic barrel in half for the grow beds. Filled both grow beds with pea gravel. I placed 8 tomatoe plants in there. 4 in each barrel 1/2. In the fish tank right now I have 4 comet goldfish. They're probably 2 inches long right now. I've been testing my water and my ph the lowest it's gotten is 6.8 and the highest 7.2. My ammonia has been 0 to 0.25 and then nitrites have been 0 and nitrates are around 10. Everything looks really good. Fish are swimming good and seem happy. Plants are growing and dark green. My system have been running since June 1st. I added about 10 gallons of water from my fish tank inside then the rest of the tank in filled with tap water and let it run for about 3 days before I added the fish.

My question is do you think I have enough goldfish for this amount of plants? And do my water levels look like they are in good ranges? Anything else feel free to comment

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Hello phil, I think there are a few fish in your system. Nitrate levels should be up to 80 ppm. Consider that you should add about 100 grams of fish food per day / m2 of plants.

However if you notice no deficiency in your plantas, you may need to keep your system running like that.

That number of 100g per square meter is based on Dr. Rakocy's research for DWC systems(actually 60-100 grams). You need no where near that much for media grow beds, more like 10 - 20 grams per square meter because all the solids stay in the system.

Tomas said:

Hello phil, I think there are a few fish in your system. Nitrate levels should be up to 80 ppm. Consider that you should add about 100 grams of fish food per day / m2 of plants.

However if you notice no deficiency in your plantas, you may need to keep your system running like that.

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