no lid (need help)

[ch-b]

I have a glass aquarium but it came with no lid :s and im worried that my goldfish can jump from it the fish store said that goldfish don't jump so can someone tell me if this is true and what fish are not jumpers?

 

[Jack sort]

Goldfish get big what size tank is it?

 

[ch-b]

40 galloon but i want know if they can jump cz im so worried :l and i want to know what type of fish are not jumpers?
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[jlk]

Is this the tank in your other post? With the tiny filter? You never provided the dimensions (LWH) for this tank and based on your picture, it only appears to be maybe 10g. Exactly what fish did you add to the tank?

As its brand new, underfiltered and not cycled, you have much bigger issues at hand right now. Please read the articles below and ask any questions!

I just learned about cycling but I already have fish. What now?! - Aquarium Advice

http://www.myaquariumclub.com/goldfish-101-11174823.html