hi.. i am upgrading to a bigger tank on the weekend and would like to know the best way to go about it.. it will be a 35 gallon tank with an external filter.. i not sure if im using new gravel or sand and would like your advice on which is best..? Also is it a good idea for me to use some of the water from my old tank, as it has been a very healthy tank in the past..? another problem i am stuck on is, i am makeing a top hood for my new tank as it has a glass sliding top and would like to fix 2 lights, one for day and one for nightime light.. what would you suggest for this idea and would you be able to give me advice on the best lights to buy..?
Another question i would like to ask is, about
UGF.. i read your article on this and would like to ask should i use it aswell as the external filter or just remove it alltogether.. thanks
