Shrimp wouldn't last winter in the pond Crayfish that I have is too slow to catch fish but they tend to 'wonder' and might escape sometimes. I think they can be in a cold weather, not sure how cold. Bring the snails from your tank to your pond! Your fish will eat them lol. I hardly see one in my pond as my fish ate them. But I have tons in my small nature pond, which is only 10 feet away.
I've been scooping the debris and muck. I did water change, mostly because my pond got emptied by mistake and once because the mulberries made the pond water wine color. I didn't take any steps, not a good person to follow in that aspect lol. I just put the dechlorine in, turn on the hose, and put the water in. I put the hose high (2feet?) so the water fall down hard to the pond, directly over the pump, so at least it got circulate through my bog filter and through the pond quickly. People suggested doing trickle methods but i've never tried it.
I've been scooping the debris and muck. I did water change, mostly because my pond got emptied by mistake and once because the mulberries made the pond water wine color. I didn't take any steps, not a good person to follow in that aspect lol. I just put the dechlorine in, turn on the hose, and put the water in. I put the hose high (2feet?) so the water fall down hard to the pond, directly over the pump, so at least it got circulate through my bog filter and through the pond quickly. People suggested doing trickle methods but i've never tried it.