goldfish in livestock tank

Hi All!
I am using goldfish to keep mosquitoes and algae down in my stock tank. Right now I have a few in a 100 gallon tank that is near electricity where I can run an aerator. I would like to expand this to my other stock tanks that are not near electricity. I'm experimenting with water plants and so far my animals are not bothering them too much. Can I get by with just a solar powered bird bath pump to keep the water circulating or will I need other pumps, filters, cleaners, etc to keep the goldfish healthy and the water clean for my animals to drink?
I've also been using 35% hydrogen peroxide in our little family fun pool and am curious if anyone knows if that would be helpful to keep the tanks clean?
One of these days we will have an actual pond for swimming, livestock, etc. but until then, I need a water solution!
Thanks!!

I have a 75 gallon stock tank with gold fish.  I don't do anything other than refill it when the horses drink it down. If it gets too murky I bail it out down to a few inches and refill.  I originally stocked it with 12 little fish from the pet store. All but three went belly up almost immediately. The metal tank froze up the top six inches on a daily basis throughout last winter. I didn't expect the fish to survive but this spring I found an additional three babies in there. So far they are all still mucking about in the horse trough without any interference from me.  Gold fish are considered an invasive species so don't put them in a pond where they or their offspring can escape.

Minnows work just as well. It doesn't take many. 1 or 2 will keep mosquitos controlled. If you can shade the trough, that should keep the algae down.

I tried putting fish into the tank in 2000.   Turned out to be more work than it was worth.  The fish added nutrients into the water which plants loved.

I now just throw vitamin C tablets into the water.   My largest water trough is about 400 gallons, and it only takes about 3-4 1000mg tablets.  I saw a video on YouTube that mentioned adding lemonade Koolaide to the water to kill off mosquitoes.   I didn't want to add that to my goat's diet however.   I had the Vet out for annual rabies and mentioned it to her.   She said the active ingredient that did the killing was Vitamin C in the KoolAide.  So now I just throw that in.

As far as keeping it clean, I have found that keeping the tanks sun-free seems to work the best.   It also helps if you don't own a horse that has taught all your other critters to dunk hay prior to eating it.  Sigh, unfortunately, all my critters are hay dippers now.   Between hay dipping and the fact that my critters take particular delight in pooping in my water trough, I have resigned myself to dumping and cleaning my troughs as needed.   Which is about once a week.  In the summer I siphon a hose to my garden.   In the winter when all the water troughs are in the barn, it is an unavoidable waste of water.

What does vitamin c cure? Plant growth or mosquitos?

I also have goldfish in a few of my watering tanks. I am not certain of the size but they are a few hundred gallons anyway. I put 6 fish in each of the tanks two years ago and they all seem to have 3 fish in them now. I don't feed the fish, aerate or filter the water in any way. Occasionally I drain the tank to a few inches and top it back up to keep the water clean(ish). Every winter the tank freezes over and the fish seem to do alright (aside from those few that died early on.)

This is all super helpful, exactly what I needed! Thanks so much everyone!!

Goldfish are a cold water fish.  I don't think they will do all that well in a stock tank.  

By happy accident,  for a couple years now I have had some frogs grace my stock tank with tadpoles.  Tadpoles eat all the mosquito larvae and they eat the algae and sometimes seem to even
eat the grass that the horses and steers leave in the water.  Tadpoles work great.  I think someone could possibly even make a business of supplying tadpoles to keep stock tanks clean.  

Goodluck with the goldfish. I have tried them and they all died quickly.  The goldfish in my tank in the house do well.  I tried bluegill, but my dog kept diving in the trough and catching the bluegill. Then
he would eat them.  He doesn't go after the tadpoles but he has eyeballed my goldfish in the my tank in the house.  LOL That tank has a cover on it.

Bonnie

We always put a goldfish in the stock trough. Goldfish don't need the water to be aerated as when the O2 in the water is low they will go up to the surface and take some out of the air. The purpose was mosquito control.