Question:
Can I put goldfish in the small ponds in my yard?
I have three or four small ponds that measure anywhere from to four feet across and a foot, foot and a half deep. I want to clean them up this summer and make them look nice and I thought some fish would be a nice addition.
Answer:
These are a few pond rules to know. Makes pondkeeping easy.
Balance your pond ecologically. Use bog plants like irises or umbrella plants. You must have oxygenators or submerged plants. The best is anacharis, followed by cabomba and hornwort. You must have one bunch of these submerged plants per square foot of pond surface. These plants arrive with a rubber band holding them together. Remove the rubber band before you put the plants in your pond. If you don’t want them floating freely, you may pot them up in several pots that sit on the bottom of your pond. The submerged plants are fertilized by fish waste and CO2, a fish byproduct. The fish eat the submerged plants, but they grow faster they the fish can eat them. Nice cycle, huh? Nature takes care of itself if we can j ust leave her alone. If you have too many fish, they will eat all your submerged plants and you have to start over again. A good rule for fish load is 1 linear foot of fish per 25 square feet of pond surface area; tails don’t count. If your pond gets green, have patience. It will fix itself
When pH gets on the basic side algae flourishes. Vinegar is weak and it takes forever (days) to neutralize. But it takes an expert to use muriatic acid properly, so do not put concentrated muriatic acid in your pond to balance pH unless you know what you are doing. You can buy commercial products, usually called pH down or some such. They are expensive, but work well.
It is good to have algae slime on the sides of your pond... this is a sign of a healthy pond and can generate up to 70% of the oxygen needed for your pond.
If you feed your fish, these simple ways of keeping your pond clear will not work. You will need a filter, preferably a biofilter.
You must cover at least one half the top of the pond with floating plants. Parrots’ feather is great, as are water hyacinths, water lettuce and water lilies. If you live in the tropics, you can have beautiful tropical water lilies. You must be willing to either sacrifice them in the winter or store them away until warmer weather arrives again in the spring.