i want to buy oscar fishes these days.and i will buy them soon.and my aquarium size is 3 feet by 1 feet.and i dont know how many oscars can i add in my tank.and one thing our country is very hot.do i need a heater in this reason? and in what temp oscars do their best? and how to change my aquariums water weekly? by a pipe? or by a bucket? and what filter i should use external or internal? have anyone had any experience about these questions? here is a pic of my Aquarium

Hello and welcome.
Before answering all of your questions let me tell you this:
Your tank is 22,5Gl and that will not be enough for a single oscar.
We advice getting a 55Gl tank at the least.
Sorry to burst your bubble, but the wise thing to do ,is getting a bigger tank running first.
Allways willing to answer any other questions but an Oscar in a 22,5Gl tank will not be happy and will not survive for very long.
Adult O's reach a foot in lenght and they need large tanks.
Hope you'll stick around though!

Noddy wrote:



x2

necromancer4 wrote:


X3

delboybully wrote:

X4 ..... nothing more to say

To be honest I can't believe this is a real post. i think you guys are being strung along. if this is a real post I suggest you spend a very long time reading through this site before you wast you money. If I was to ask how many people can live in a car boot??? This is how your question comes across to me. Please don't even consider it. A Oscar will grow to 1ft so would not even turn in a tank your size.

wtf?