Can someone please advise me what levels would be recommended for a freshwater aquarium. I would like both tropical aquarium levels and coldwater aquarium levels if there is any difference:
NO3 levels
NO2 levels
GH levels
KH levels
pH levels

Thank you for any advice you can give :o)
Thanks for your answer Smellen94 but the link doesn't work! Argh! Can you offer any more assistance?

Thanks

Saltwater Fish Tanks