Hi and welcome to the forum
Can you post a picture of the entire tank?
Reduce the feeding to 2-3 times a week until the filter has established, then you can feed once a day. Don't worry, the fish won't starve. Unlike mammals and birds that use most of the food they eat to keep warm, most fish take their body temperature from the surrounding water. This means any food they eat is used for moving and growth.
Do big daily water changes to help keep ammonia levels down while the filter develops. In a month or so when the filter has established, you can do a water change once a week.
Make sure any new water is free of chlorine/ chloramine before it's added to the tank.
Do you have a picture on the back of the tank?
You can buy aquarium backings from any pet shop, online, or use coloured card or a plastic bin liner. Just tape them to the outside on the back of the tank. The backing will help the fish feel more secure.
TURNING LIGHTS ON AND OFF
Stress from tank lights coming on when the room is dark can be an issue. Fish don't have eyelids and don't tolerate going from complete dark to bright light (or vice versa) instantly.
In the morning open the curtains or turn the room light on at least 30 minutes (or more) before turning the tank light on. This will reduce the stress on the fish and they won't go from a dark tank to a bright tank instantly.
At night turn the room light on and then turn the tank light off. Wait at least 30 minutes (or more) before turning the room light out. This allows the fish to settle down for the night instead of going from a brightly lit tank to complete darkness instantly.
Try to have the lights on at the same time each day. Use a timer if possible.
If you don't have any live plants in the tank, you only need the light on for a couple of hours in the evening to view the fish.
What is the GH
(general hardness), KH
(carbonate hardness) and pH of your water supply?
This information can usually be obtained from your water supply company's website or by telephoning them. If they can't help you, take a glass full of tap water to the local pet shop and get them to test it for you. Write the results down (in numbers) when they do the tests. And ask them what the results are in (eg: ppm
, dGH, or something else).
Depending on what the GH
of your water is, will determine what fish you should keep.
Angelfish, discus, most tetras, most barbs, Bettas, gouramis, rasbora, Corydoras and small species of suckermouth catfish all occur in soft water (GH
below 150ppm) and a pH below 7.0.
Livebearers (guppies, platies, swordtails, mollies
), rainbowfish and goldfish occur in medium hard water with a GH
and a pH above 7.0.
If you have very hard water (GH
above 300ppm) then look at African Rift Lake cichlids, or use distilled or reverse osmosis water to reduce the GH
and keep fishes from softer water.