hi new to forum new to fish keeping we started in may this year 1000 lt pond added water lettuce oxygenators and water hyacinth a water lilie which has not grown the pump is an easyclear6000 which is working fine. 9x3inch gold fish 2x4inch shabunkins 2yellow gold fish 4inches i have been told not to feed if temp is below 10 deg which is starting to happen now.so do i stop feeding altogether or if it gets warmer do i feed then . do i leave pump on all winter shall i try to partialy cover pond as very open. thanks for reading any help welcme
I don't know where you live, climate would really affect the best options. So I'll just say some general things.
Yes, 10C (50F) is a good guideline to stop feeding. But it's not digital meaning 9C is certain death and 11C is perfectly fine. It's just a guideline people kind of all said if we have to pick a number, 10C seems reasonable.
As water gets colder the fish's systems slow down and they don't digest food as fast. The thinking is if we feed them a lot of food they could end up with a gut full of food which can cause problems. Just like some people have digestive problems and have to not eat too much, and/or too much of certain foods.
There are easier to digest foods (wheat germ based) that can be fed down to say 4.5C (40F). But most people don't bother, fish are OK without it.
If the water warms up (not the air) the question to ask yourself is what do you think the water temp will be over the next few days (including night lows). If it's spring you might start feeding when the water temp is 5C because you expect water temps to rise. Or you might play it safer and wait.
I don't go too much by water temp. If fish are active, seem to be looking for food, I might give them some, but in winter I won't give a lot. My thinking is there is food in the pond...algae, bugs, so fish do eat. I assume, like us, if they already have food in their gut they wouldn't eat more. Never believed Goldfish eat until they pop. However, I've been around pond fish a long time. I started slow, fed a little, see what happens. Next year a little more. And I do it only because I like too, not because I think the fish need it.
So the standard line, and I think it's reasonable, is to stop feeding at 10C (50F).
Whether to turn the pump off or on is a personal choice that should be influenced by climate.
In really cold climates there isn't a really good choice. The negative is when ice covers a pond gas exchange slows down (basically stops) and O2 drops and harmful gases increase. Fish load and the amount of decay determines the risk. I'd say for most ponds maybe ice covered for more than a month starts to be a concern. But it's not like a day or a week is a problem. Running a pump can keep at lease some hole for gas exchange in the ice unless the air drops too much for too long.
The plus side to ice covered pond is that it can keep fish warmer. Most people know warm water rises, but that's not entirely true. Water at 4C (39F) is most dense and will sink while water 3,2,1C will rise. Without any mixing from wind or pumps the water at the bottom of an ice covered pond can be 4C. Wind and pumps mix the water, allowing it to cool below 4C so fish can be in 0C water (even minus) water for long periods. Goldfish and Koi can survive much longer in 4C than 0C.
So the unfortunate choice is trying to figure out which is the biggest risk. Things to consider...Cold water holds more O2. Cleaning a pond before winter reduces decaying matter which would reduce harmful gases reducing the risk of ice covered for long periods. Fish load must be considered.
My own opinion is if you live in a climate where it is so cold that a pond is ice covered for more than a month a pump really isn't any kind of fix because it probably isn't going to keep a hole in the ice for very long any ways. So you end up with really cold water (although the ground will heat it back up) and poor gas exchange. Covering a pond is really what people in that boat use. Works great as long as it's not a floating type cover. You want air space between water and cover.
In moderate climates I don't think there's any great danger from leaving the pump on or off. Iced over pond for a few days, a week or two, is no big deal except for the very few people who have really big fish loads. In those climates even with the pump on water probably won't go below 4C (39F) anyways, and even if it does for a night or two the fish can normally handle that unless they're already in bad shape.
Water Lettuce, Water Hyacinth and Water lilies would not be oxygenators for the pond. When the sun is out they would release O2 into the air. Their roots would consume some O2 in the water (not a lot, not worth being concerned about).
Healthy underwater plants, like algae, do oxygenate the water when the sun is out. But at night they consume O2 and produce CO2. Plus any decaying plant matter would consume O2 and produce CO2 day or night. So even though some plants are called oxygenators they're not really a benefit, O2 wise, since if there was an O2 problem the fish couldn't make it thru a night of really low O2.
I doubt that it is really deep enough for the different thermal layers to form properly, for your location. If it were my pond I would add a small pond heater to keep part of the surface clear of ice and turn the pump off for winter (dec - feb). If you really intend keeping fish I would certainly consider making at least part of it deeper asap in order to make life easier for the fish. As it is in a really cold winter you may lose some fish - sorry.
hi finnipper o.m.g. when I bought the pond I was told it was big enough for koi glad I started with gold fish first I am now going to try building a frame to protect the pond and add a heater thanks again
waterwoman wrote: when I bought the pond I was told it was big enough for koi
Not that you were going to keep koi, but just as a matter of fact, koi ponds should be at least 5 feet deep (not 2)so who ever told you yours is suitable is very wrong.
Koi need to be able to swim up and down to keep their shape, as well as swim from side to side.
I would never tell anyone to turn the pond filter pump off. Take the UV out, yes, but if you turn the bio filter pump off the water in the filter will turn stagnant, and any good bacteria will die. By leaving the pump running you keep the filter "ticking over"
Good quality costs. Bear this in mind before you start.
Sorry if my reply is NOT want you want to hear, but what I have said is true.