Need A Change Of Stone

[Phil Crane]

Ive came to the conclusion i need to change the stones in my tank as the fish can get under my filter and swim up and get stuck, im wondering how many KG of gravel will i need for my 4ft/180l tank to give it say a 2 inch depth

 

[minnnt]

I would go with about 25kg and see how it looks then.

 

[AlexG]

I would go with about 25kg and see how it looks then.

yep, about that

for OP's future reference :

Calculator

 

[KISSfn]

Ive came to the conclusion i need to change the stones in my tank as the fish can get under my filter and swim up and get stuck, im wondering how many KG of gravel will i need for my 4ft/180l tank to give it say a 2 inch depth

That's a shame because those are cool looking stones!