Goldfish Breeding, Aquarium Setup, Tank Mates, Food, Fries, Diseases, & Full Care Guide:

Goldfish are tough species & they need simple care. Good quality water can save your fish. Feed your fish a variety of foods, & regularly monitor water quality. If you are taking good care of your goldfish, then you can save them from getting ill.

Goldfish Disease Symptoms:

  • Gasping for breath, quick breathing, or hanging at the surface of water
  • Stop eating or losing weight
  • Can’t swim properly or swimming upside down
  • Laying at the bottom of aquarium
  • Not showing fast reaction to disturbances
  • Rubs its body against tank glass & objects
  • Clamped or folded fins
  • Torn or frayed fins
  • Fluffy patches, discolored spots, or raised bumps
  • Bloated
  • Pale gills
  • Visible lumps or parasites
  • Protruding eyes
  • Sores or missing scales

Goldfish Care Guide And Breeding
Goldfish Care Guide And Breeding


Goldfish Diet:

Variety of foods will enhance your goldfish health. Feed them a combination of specialized goldfish flakes & granules as a better staple food. Also offer them live brine shrimp & frozen brine shrimp, daphnia & veggie mix. Make sure your food has a higher carbohydrate level. Frozen dried food must be soaked first before feeding it to goldfish to prevent digestive problems.

Offer food to goldfish 2 to 3 times in a day. Do not overfeed them as this can affect digestion & can poison the water. Only provide food that the fish can consume within 2 minutes or only offer food to goldfish as much as the size of the goldfish’s eye.

Offer goldfish small pellets because it is the top food that keeps water clean as more food can be simply removed. The small size of pellets ensures that all of the goldfish get their share of the food.

Goldfish Aquarium Size & Requirements:

Goldfish is a tough fish & it is recommended for both novice & expert. Make sure you plan to setup an aquarium that has plenty of water so select an aquarium that is suitable for goldfish even when they grow up. Many species of the fish grow up quickly & quite big in size so they are called messy goldfish & they make a lot of poop. If you are planning to keep goldfish in a small aquarium or bowl then it is not a good idea. Comet goldfish can have a size of 35 cm & they are suitable for ponds instead of aquariums due to their fast swimming. Other fancy goldfish including Oranda, Ranchu, Pearlscale & Black Moor etc., grow 16-25 cm in length & are slow moving goldfish. Due to large future sizes of goldfish, it is better to start with an aquarium size that is at least 110 – 115 liters in volume which is about 3 feet aquarium.

Goldfish Tank Substrate & Decor:

Buy smooth & tough decorations because Goldfish mess with nearly everything. It is up to you whether you use substrate in aquariums or not. Goldfish produce lots of poop so it is a good idea to keep the aquarium bare bottom in order to get rid of the waste using a poop filter.

Goldfish Tank Decor
Goldfish Tank Decor

However, if you want to add substrate to the aquarium then select any color that you prefer, but based on my recommendation a dark colored substrate is better to help get rid of dark waste build up in the aquarium. Make sure the size of the substrate is from mid to large & do not add sand as substrate because goldfish can eat it. Always choose a gentle decoration with smooth surfaces to save your goldfish from getting hurt. I removed every decoration from my aquarium after adding fancy Goldfish to keep them healthy.

Goldfish Aquarium Filter:

It is very important to add a filter to the goldfish aquarium. A large volume of water turnover coupled by highly effective filtration is needed. Water flow must be at least double the capacity of the aquarium. It is advisable to add 2 types of foams for mechanical filtration. Also fish keepers use 3 types of foams including coarse foam, medium foam & fine foam for efficient filtration. It will ensure that just clean water flows through the biological filtration media. Adding ceramic media will help you get rid of toxic chemicals.

A fish poop filter can clean the bottom of the aquarium. This filter works best in bare bottom goldfish aquariums.

Lighting & Temperature:

Tank lights can offer essential vitamins to fish. Aquarium must have lights & fish can use them to see food & have fun in the aquarium. LED strip lights are a good option in aquariums too because it can alter its color automatically providing a fancy look to aquariums.

Goldfish Tank Lighting
Goldfish Tank Lighting

Better lights can play a major role in keeping fish healthy. Like other species, goldfish require light. If goldfish are not healthy & do not show vibrant colors, then one of the reasons could be poor tank lighting because goldfish need light to make essential vitamins. A complete spectrum is a requirement of every aquarium that does not get natural light. Fancy goldfish are delicate & can do well in warmer aquarium water that does not fluctuate enough. But most goldfish species can do great even without using an aquarium heater.

Goldfish Breeding:

Goldfish are able to lay eggs when they are offered the right nutrition. Most of the species breed in closed settings, such as in ponds or aquariums. Breeding process starts after a significant change in temperature, often in spring. Female lays eggs & the nature of these eggs are adhesive & it attaches itself to aquatic vegetation, typically dense plants. The hatch time of eggs is 48 to 72 hours.

In the first week of hatching, baby goldfish grows quickly.

Goldfish Mates:

Do not add aggressive mates that may hurt your goldfish. Goldfish are peaceful in nature & they will not live safely with aggressive barbs, African cichlids & other large cichlids.

Your goldfish has high speed. Common goldfish can swim extremely fast & they like to swallow things. Fancy goldfish can swim slowly therefore bullies can chase & hurt them.

Make sure you do not introduce small & spiny species. Goldfish have the habit of swallowing things such as food, substrate, plants & smaller species. Do not add any fish small enough to enter the goldfish mouth. Consider the max. size of completely grown up goldfish when selecting tank mates. Also do not add smaller fish with spines, such as otocinclus or cory catfish, which could get stuck in goldfish’s gill plate if they swallow it.

Below you can find top 10 goldfish mates that follow above conditions & are the best mates for any type of goldfish you are keeping.
  • Hillstream Loach
  • Brochis multiradiatus
  • Dojo Loach
  • Bristlenose Pleco
  • Rubbernose Pleco
  • White Cloud Mountain Minnows
  • Ricefish
  • Hoplo Catfish
  • Variatus Platy
  • Longfin Rosy Barbs

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