This last year has seemed to quadruple in speed. So much has happened and changed that I did not even realize how much I have neglected my aquaponics systems in the greenhouse.
You know you have not been paying attention when you find moss growing on your grow media! The grow bed above “B” tank in my greenhouse has collected a large amount of fish poo in the grow media, allowing for moss growth on top and around all the edges.
Honestly this past winter, I did not grow much in this bed and kept feeding the fish as normal. The tank is currently over-crowded with about 30 adult tilapia fish, which produce a large amount of waste.
I have a swirl filter attached to the system to help eliminate heavy solids, but I have not kept up with cleaning and draining the swirl filter on a regular basis. The swirl filter with an over-populated tank should be drained every other day and cleaned about once per week. Through the winter, I probably drained it every 2 weeks and cleaned the filter once a month-very neglectful on my part. Truly I am surprised I have not lost fish from the tank as the ammonia levels are way out of control.
I dug down into the grow media a few inches and found the majority of fish waste was contained in the top 2-3 inches of the media. I took off the top few inches and rinsed it thoroughly before replacing into grow bed.
I added a pound of red wigglers to the bed, which should reduce the amount of solid fish waste, since they feed heavily on the waste. Planting the bed full of herbs or other plants will have a significant impact as well.
Over the course of the next few weeks I will drain the filter daily and clean the filter two to three times a week. I am hoping within the month this will clean the majority of the waste from the system and get it back in balance.