thanks for all the replies, I think slate tiles and silicone are pretty funny ideas. I'm not sure whether they wouldn't be to smooth for the axolotl or not, but i think i've seen some rough slate tiles somewhere. I will definitely check this slate tiles-thread out :wacko:
It is true that safety for the animals must come first. I am by no means planning to implement something harmful to the axolotl tanks. That's certainly a good point to make :happy:
So maybe i will look into different (natural) colors of sand (white or black or red)
This should also make a difference...
Thinking a red wasteland with some old wood and some yellow or white axos ^^
Or a black tank with white wood and gfp axos

) - man this would certainly look nice.
I also thought about letting the whole bottom overgrow with some moss before letting the axos in. This would need warmer water, decent lights ans co2 in the beginning.
Does anybody know whether the moss will survive if i suddenly skip the lights and co2 and lower the temps. Will it just cease growing or will it simply die?
Is there something like artificial moss? hmm....
I like the idea of big jewel like stones. Put some underwater LED between them and this may sparkle very nive. Don't know whether the axos will like them.
Has anybody experiences with mud at the bottom. It obviously will be very cloudy at the beginning but i think it could look very nice...