I do not.Do you know the GH of your water?
Ah ok excellent!If the fish currently get a water change from the same town water supply as your water supply you probably don’t need to worry about the GH of your water? They are in theory a hard water species. But can survive in less minerals than the recommended 100 ppm - 200 ppm GH .
Awesome, and they don't need a heater, right?In short it’s exactly the same routine.
In reality they have a shorter stomach and poop half digested food. They are called a messy fish because of their poop. However it’s the same routine of removing nitrates and vacuuming poop. Or keeping the nitrates low.
Ah! We eradicated our duckweed a while back, that's annoying!Use the same prime.
Feed them duckweed if you have it. They eat soft plants and would enjoy vegetables more so than some tropical species?
Match the water temperature.
Goldfish can be super easy, you wouldn't need a heater unless the temp get to low although they can handle it it's best to keep there temps round 15C.
Normal wc routine but as flyfisha said they re big poopers so I'd do minimum 30%weekly or 50-60%every 2nd week.
test the water before water changes. if 20ppm or less nitrate, then do 50% water change. if 30-40ppm do 75% water change.
if you're doing 75% weekly water change and the nitrate is still over 20ppm, then you're overcrowded, and will either need to get a bigger tank, or separate them into more tanks, or do 75% every 3-4 days.
in my experience goldfish do not do well when weekly nitrate levels are over 20ppm.
What type of goldfish are you accepting for rescue?
How big is the tank you will use?
Fancy goldfish have chunky bodies. Although they do not get as large as single-tail comets, they need a minimum of 20 gallons per fish. If they are near the full adult size around 8", they may need even more space. Comets can grow to over a foot long and need about 50 gallons per fish, so they are really better suited to ponds.
Sorry, I had not noticed the photo. To me it looks like it might be a 40 gallon breeder tank which would be around d160 liters. That should be OK for two fancy goldfish for a while. If they ever grow to full adult size, it might become too small.It’s the fish/tank in the picture; I believe they are fancies and it’s a 200L tank.
It’s 200 litres that I’m sure of.To me it looks like it might be a 40 gallon breeder tank which would be around d160 liters.
Awesome, thank you for the extra information!Goldfish are quite greedy and will consume as much food as you feed them. You probably do not need to feed them buy once a day and an occasional fast won't hurt them. The frequency and quantity of water to be changed will depend on your feeding level.