Vallis Control......

[Behold]

I like the vallis i have i think it looks good and adds height to the tank. Is there an easy way to contain it to an area of the tank? or do i just keep pruning

Thanks

 

[aaronnorth]

keep pruning or you can get one of theose plastic tupperware boxes and cut it in a strip then bury it in the substrate to stop it spreading.