Ammonia (NH4) is bad for everyone. Fortunately, it converts to Nitrite and then on to Nitrates. I hear too much about nitrates being in hot dogs which are bad for me to eat. However, plants love nitrates.
Mother Nature sure is awesome! Everything that kills fish can be converted to something that plants thrive on. We take advantage of that very fact in everything we do in aquaponics. That symbiotic relationship between fish and plants is what makes aquaponics so much more enticing to me than hydroponics. Nothing is wasted and there are no harmful affects on the environment when we combine aquaculture with hydroponics. Not too mention that aquaponics out produces hydroponic growing after the systems have been in place for at least six months. With hydroponics I would have to start fresh with every system flush while aquaponics does not need to be flushed. The system just gets more and more effective with time. The next lecture in the course is on cycling the system too. You can get the cycling supplies here.
Fishless cycling is the best! It is a lot safer for the fish and farmers don't stress out their food. I mean, who likes killing fish anyway? I sure don't want to loose them to nitrogen. Besides, the nitrogen converting bacteria get a better start with fishless cycling anyway.
On a side note, have you ever noticed that bacteria seem to be named after the things they eat.
To your successful urban farming,
For more info see me at http://www.scottalanwesthoff.com
Scott
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