I've bought myself a new 54 litre tank. In the past I have had coldwater fish but I'm thinking of going tropical this time. What are your opinions? Should I stick with coldwater as that is where my experience is?
Also, I have thought about having some Guppy's. I have read they can be cold water or tropical. What conditions are best for them? Temperatures etc?
Tropical are much easier to keep than coldwater and there is so much more variety. You basically look after them in exactly the same way as cold water species you just need to spend £20 on a heater. As long as you research fish to make sure theyre compatible with each other then you'll be fine.
As a starting point read all the articles and faqs at the top of this foum and the tropical chit chat one. Please consider fishless cycling your tank before adding any fish (link in sig. and follow thw add & wait method.) 54 litres is 14 US gallons so you can have roughly 14 inches of adult fish to stock your tank with. i.e. 14 fish which all grow to an adult length of 1" or other combinations. Don't be tempted to exceed this in the beginning as disaster is sure to follow.
I hate guppies with a passion and think theyre the rat of the fish world, constantly breeding and filling your tank with live young which you don't know what to do with. Theyre reasonably easy to keep although not as hardy as they once were and still popular in the hobby. I would consider other options though. Galaxy Rasboras, tetra species, cherry barbs etc B4 guppies but that's just my taste.