Information on Fish

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Click on the link below to investigate a freshwater fish guide that offers a lot of information that will speed up your learning curve.

What Fish? A Buyer’s Guide to Tropical Fish: Essential Information to Help You Choose the Right Fish for Your Tropical Freshwater Aquarium (What Pet? Books)

Q and  A for Information On Fish

Question:  Information angel fish?Hello all!
I have an empty fish tank (due to an unfortunate accident :(, but that’s a different story.) Anyway the tank measures 24 x 13 x 11. I do not have a heater or a filter or anything yet, but basically I want to raise a few angelfish. I need every piece of information you have got, (LOL) Like how many to keep in my tank? Do I need a heater/filter, etc?All information is greatly appreciated!

Posted by Onni Elliott

Answer:  A 14 gallon tank is not really big enough to raise angels. They need deeper water and room to swim. You also need to put tall plants in, so they have somewhere to hide.I wouldn’t put more than 3 or 4 at the most in that small of a tank. Good filtration will be a must. Use a filter with about 100 gph (gallons per hour) throughout. Put it on the back (not the side) of the tank, so the inflow current is only at one end of the tank. Angels do not like currents in their tanks. They come from slow sluggish streams and tributaries of the Amazon.

One will become dominant and the others will need places to go, where he can’t see them. Plants, tall decorations are good.

They are south American cichlids and need temps around 78-80 degrees with a pH in the range of 6.5 to 7.2. In the wild, they live in very soft water (around 6.5) but the tank raised fish we get now are OK in the range I mentioned.

If your tap water is higher than 7.2 pH, put a ball of peat moss in the filter for a week or two at first when you get them. The pH will start low and then remove the peat moss when the fish have become accustomed to the slowly rising pH. Try to find out what the pH of the fish store tanks is and try to match it for the first couple weeks until they acclimate to your water.

Don’t buy fish that have just arrived at the fish store unless their tanks are VERY healthy and you see no dead fish anywhere in them. It is a good idea to wait for a couple days at least before you buy them. Many times they are shocked at the fish store and do not survive when you bring them home.

Angel Fish are carnivores, so feed a high protein diet with at least 40-50% protein flakes. Treat them with frozen brine shrimp, frozen red worms and common guppy fry two to three times a week.

Water changes are a must. Do at least 25-30% changes once a week to keep them healthy and happy.

Email me if you have more questions. Good luck.

Question:  Black Knife Ghost Fish tank information?I work in a pet shop in Australia called Petbarn. We have these unique fish in store, and I absolutely love them. I’m gaining more and more experience and information about fish and these particular ones every day. I’m seriously considering getting one of these, not now, but in about 3 months time. Just wondering, in Australia, what tank size would be good and big enough for one of these fish?. I’ll be buying a small one, presumably a baby one. I don’t really want to go out and buy more than one tank, especially as they can be quite expensive. And what types of fish can be in a same tank as a Knife Ghost Fish? Thanks!

Posted by Sazz

Answer:  You need a minimum 250 liter tank. There’s nothing complicated about keeping ghost knifes. They are like any other fish.

  • cycle your tank – most important
  • provide the ghost knife with a hollow driftwood to hide in. They are nocturnal so most of the time they hide. They also have very poor eyesight so you need to make sure they find the food you give them
  • only keep one because they fight
  • they don’t have scales so don’t add things like salt and make a sudden change in ph.
  • keep temp at 24 Celsius and pH neutral. I live in Sydney and the water here is alkaline..so if you don’t have a way of taking down your ph and stabilizing it and keeping it stable at every water change then its better not to touch the pH. A stable ph at 8-9 is better then a fluctuating pH. The fish will adapt.

They aren’t expensive they are usually $20. I had one a long time ago and it use to eat blood worms out of my hand. They are cool smart fish.  Just do some general research into how to cycle a tank properly and how to maintain it and you will be fine.

You can really keep anything friendly in a ghost knife tank. They come from the amazon so I would stick with other fish tank come from there like angels.
Get a 250-300 L tank, get 1 ghost knife, 5 angelfish.

Question:  Fish Tank Information?I want to buy my brother a tank for Christmas. I would pitch in with my other 2 brothers to get him something decent. The thing is, I don’t know what a reasonable size is or what kind of fish to get along with it. He has a small freshwater tank right now, no heater, just a filter and a light. It’s most likely a 2 1/2 gallon tank. I was thinking about getting a 10 gallon tank, and fill it with salt water and salt water fish etc. I don’t know anything about tanks or salt water fish. If you could give me information about your own personal tanks or someone who you know I would appreciate it. Thanks.

Posted by Nick_Candiano
Answer:  I definitely wouldn’t buy a salt water tank. Especially a small one. Salt water fish can be very picky, as well as expensive. So in a smaller tank, any fluctuations in water content can be fatal, and like I said before, salt water fish ARE expensive, though if you have the money and time, definitely worth keeping.
I would get him a 10 to 20 gallon freshwater tank with the usual heater, filter, light, hood, gravel etc. I just made a smaller tank recently (15 gal). I got the tank for $20  at Walmart, the filter with cartridges for $30, the heater for $20, gravel for $15, as well as a bunch of test kits (ammonia, nitrites, nitrates, etc.) for $25. I also used live plants and stuff so it ended up being about $150 dollars. Try buying a 10 gallon kit though. They are usually about $70 dollars and give you all the equipment to set up a tank. You can put in 5 tetra or 4 platy or something along those lines. Also some good starter fish are:

  • livebearers like platy, mollies etc.
  • Cory cats are fun and useful tank cleaners.
  • Barbs like the cherry barb.
  • Danios
  • white clouds
  • dwarf gouramis

These are some hardy inexpensive fish, normally I would recommend tetra, but regular pet stores lately seem to sell pretty fragile ones.

For a smaller sized tank I would use the 1 inch of fish per gallon rule. It’s not perfect but works pretty well. Just make sure all the fish in this rule are below 3.5 inches.

Don’t add fish immediately either because of the nitrogen cycle. Read this: Nitrogen Cycle. It will help you a lot.

Good luck.

Click on the image to learn about The Simple Guide to Freshwater Aquariums (Second Edition).

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Fluval Spec 5 Gallon Aquarium

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