So I’ve been recapping my FAA with sugar every few days for a couple of months now. I don’t try to get a full packed cap like it was at first but I’ve been on top of sprinkling a fresh layer when things settle and the liquid comes up. I’ve noticed that the sugar is definitely floating/sitting on top of the liquid more when I add lately. Is there any chance I could end up super saturating to the point of depriving the microbes of available water for their digestion process? I imagine there is tons of water in the fish, so it would take a lot but I’m estimating I’m close to 15 pounds of sugar with about 7 pounds of fish in there.
There is no need to continually sprinkle sugar on the top unless you are getting odor. If you are getting odor, the first thing to do is to try to submerge the fish under the liquid, sometimes with a large stone. If the odor still persists, then add more sugar to balance it out.
And by odor, I mean, there will be a smell, but the smell should not be rotting. Fish sauce and KNF Fuel should smell sweet like the stuff you buy at the store for food. If it smells like dead animal or rotting eggs, that is what I am referring to as odor.
To go more specifically to the situation you have, I don’t see anything necessarily wrong with it. I have found it is nearly impossible to add too much sugar to the KNF Fuel. But, I would stop adding more at this point especially as you are 1:2 with sugar.
Often I will have fish that is not submerged and it will grow a little white or yellow molds on it. That’s fine. There is still no smell and it feels like a mummy. So well preserved.
The main microbe action in the KNF Fuel eventually comes from KNF Police, aka Lactic Acid Bacteria, and they are hardcore and will operate just fine even in a super/over saturated environment. They are beasts.
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