Mine is always that way over winter, turned off, water drops to just below the gravel, evaporation factor and some drainage. In the early spring it grows back to the point I do a early purge of growing plants.I'm interested in the placement in your bog. The water is right below the gravel in mine, so would have no water to aerate? I just turned off the pump and drained the lines, water dropped to just below the gravel....hoping everything makes it next Spring.
Plus there are fish living down there
That's hilarious! I have always wondered if we could possibly have fry make it into our rain exchange - or eggs make it down there and then hatch. Haven't found one yet, but anything is possible!
I have a new weapon against the over population of the pond from fry it's an all natural solution . A King Fisher has found my pond I don't believe they will go for a fish over 4" a koi that's 4" i could be wrong but that's ok even my babies from last year are now over 6" long I do have two babies from this years breeding that are pretty cool one is silver and black very uniformly marked but is a short fin . Another is a long fin and i mean real long as it's just a baby and it's tail is as long as the body if not more but he is a dark brown "time will tell if they can survive the Arial bombardment of the king fisher"I get fish in my fishless ponds all of the time, they go through the pump, down the garden hose feed, down a small water fall and turn the fishless pond into a pond with fish. I even get them up in my deck ponds, they go through a clear water pump, up 50ish feet of piping down a waterfall into the pond. They either travel as eggs or small fry, no clue really. My guess would be eggs but pure guess.
I have 6 fish in my lotus tub pond, they did the garden hose travel into the first pond then over a small water fall to end up in the lotus tub pond.
I just leave them be, they survive the heron, the winters , no water movement all winter and some good freezes.
I have to closed in the top of the pond as yet so far so good i think the flight path is too tight for the heron and i have the net closing off the back yard if they were to try to walk in. even the ospree i have seen fly over head and hover only to fly away if they dove into the pond between the wire at 16 feet on two sides the house on another and the garage it leves little flight path horizontaaly for them to fly away.Have used the heron around my pond for population control as well as the terrapins in my pond for the longest time. However, I drew the line when a hawk decided turtles were on its menu. So now I have a wide weave net stretched up high above the pond since this summer.
Will add some turtles back to the large pond this coming summer as the juvenile turtles will be 3 years old by then and fairly large.
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