Add a few sea shells.
To clean out the water and make the fish feel more free and open
We pollute water and kill fish. Fish can be an important part of our environment.
One can buy used fish tanks on AquaBid. On there, you can buy or sell used fish aquariums. Many tanks on there are cheap and afforadable, but make sure you clean it.
The Roman empire had a very large industry making fish tanks, before that, the Chinese had been raising fish in holding tanks for about a thousand years. Before that, people were probably building fish tanks since before we understood how to make fire.
Damsel fish species include fish like Chromis and Clownfish (like Nemo). They are saltwater fish and if you decide to purchase saltwater fish, please make sure you know how to take care of them. Saltwater tanks must be maintain everyday, especially making sure that water chemistry and temperature is maintained. If you decide to get coral, you must have very strong lighting to simulate sun light. It will get expensive. Budget accordingly. Bigger tanks are easier to maintain than smaller tanks. Water chemistry stays more constant in larger tanks.
Yes you can but I don't know what you hope to achieve by doing it. All you will do is reduce the amount of oxygen in the water and make it harder for the fish to breathe.
I use to own a fish only pet store. The saltwater tanks were a nightmare, constant testing, etc. I would recommend you go to a Pet Shop that has salt water fish, preferrably a one owner store. Make sure the saltwater tanks look good to you, clear water, healthy fish and then ask the owner your questions.
If you are talking about fish that can be used in tanks, oscars, tiger fish, and lionhead. These fish start out small, but if they make it, they get very large.
Fish tanks are often used to make terrariums, but to support aquatic life (fish) one needs to use the tank as an aquarium. For supporting land-living life (terrestrial life) one needs to user the tank as a terrarium. Aquariums need to be water tight, while terrariums may or may not need to be.
It is cheaper and safer for use with young children, harder to brake. Only small or very large "perspex" tanks are plastic as they go cloudy with age and get scratched easily. Kids can't brake the plastic easily. Perspex is used in large tanks, 3 metres plus due to cost, $5000 perspex or $17000 glass
Ground oyster shells will make soft water harder. Therefore, it will make hard water, harder.
Depends. answers will vary.