Velks, asking about sand or gravel is like asking who's best, democrat or republican. LOL You'll get equal opinions both ways. Both will work very well if you set them up properly. Also if you plant on planted or unplanted. etc. I like both each for their own affect. I found that mixing sand and gravel together really doesn't work as the finer sand will eventually settle below the gravel so all you see is the gravel. Whichever you chose, go for it!
Caudially, OS
I guess that also depends on if you are planning to have a planted tank or not. What is your opinion on that?
Then sand will be cheaper. But if you go to plants later, sand is not a good substrate...it does not hold nutrients well and has none of its own
Then sand will be cheaper. But if you go to plants later, sand is not a good substrate...it does not hold nutrients well and has none of its own