We have finally gotten our tank under control....it is a new tank...and I know we can safely add one more  Moor into it...right now...we have an algae eater, and a black moor.....it's taken a few months and loosing a few fish, but everything seems good. What I want to know is if i get another moor from THE same tank....does it need to be quarantined?  This whole fish thing is new to us, the tank is for my 4 year old son. Everyone is happy right now in the tank....the tank is 14 liters,  or should i even bother with getting another..? the instructions say i can have up to 3 fish in the tank...thanks for letting me pick your brains... 

Thanks, why do company's make things and suggest the improper usage of them!! Drives me bonkers.  All our readings for the tank thus far pretty good...we will look into a better tank....it's amazing how much work goes into having fish....not complaining in anyway..i happen to enjoy them....so does our cat...but the fish a kinda cool!!  Like I said I am totally new to the fish as pets world, and I really appreciate your input. I was  glad i stumbled upon this site. L) cheers!

Oh your welcome! You could keep a betta in your bowl.

and it's nice to meet ya!!!

The wisdom for tropical fish is 1 inch per gallon. Or in metric, about 2/3 cm per liter.

But none of that applies to goldfish.

Goldfish have have two characteristics that most tropical fish don't.

First is that they grow fast and big. Up to around a foot long. Check out the big goldfish tank during your next visit to a Chinese restaurant.

The second is that goldfish lack a stomach. They eat a lot and they produce a lot of ammonia as a result of their digestive system. All that has to be taken care of by bio filtering and a lot of water. Or you will keep having sick fish that die.

You should be looking at a tank of around 100 liters for the two goldfish and the algae eater. That should be enough to discourage you!

Fish have different social structures. Goldfish are highly social as well as intelligent and really benefit by having a small shoal of fish to swim with.

  The thing with goldfish, in particular the hardy common, shubunkin and comet varieties is that they are tough fish that can live in circumstances that will quickly kill other fish. That doesn't meant that is right or proper. Now think about all those images of a goldfish living in a goldfish bowl and being flushed when it was perhaps just an inch or two long when it should have been at least 6 inches and lived at least 10 years.

  It is just a fish, and one that is commonly fed to other fish. But I think you want to do better, and you can.

  Fishy Jeff

Would make a nice tank for a Betta.

They could also add a couple of Amano shrimp and Nerite or Assassin snails to help keep it clean.

Just don't try to add Nerite and Assassins together. Nerites eat algae, Assassins eat snails... hence the name. They also eat uneaten food and junk that falls to the bottom of your tank.

I've also had luck keeping Dwarf African frogs with Betta fish. Just make sure they are Dwarf frogs, not the regular African clawed ones.

What's a Parrot Goldfish? I have never hear of any such thing?

Ambiekate: So are you looking for a nice 100 liter tank now?

Ah! No, that's a parrot fish I don't remember exactly which family it belongs to, but it's definitely not related to goldfish