thank you for your input toni!
Sorry if this is a late reply but i've been busy out and about. im trying to re-create a rainforest effect for my toads. and well i want the land part to be completely water tight so i can moderate how much water my plants will get so they dont drown basically.

I really want to create a curvy land space that looks natural and am sturggling massively on how to create this, as in what materials and mediums to use. i was thinking acryllic but with that i cannot create that specific curve im trying to create? so im looking at other options yet i dont want to be ruining my tank at the same time if you catch my drift.

and with glues, if i do need to use one what glue would i need to use?

i find this quite frustrating at times cause i know what i want yet am not clear on how to create the look i am after, yet i see other people have done theirs amazingly and i wonder... how on earth have you managed to create such an amazing tank? haha

thanks for your input it has helped alot!