Hi everyone, I am a new member and intend to embark on marine fish keeping. I have kept tropical fish since I was about 12 and 30 years on I think I am ready to take the next step. I need to know what equipments I need to embark on this. The only thing I have now is the tank. Is there anywhere I can buy these equipment second hand as I understand the intial cost is very high, in time I intend to buy everthing new.