I would highly recommend the Tamron 90mm macro lens - if you want to take half decent close up's of your tank then you will need a macro.You single guys are amazing :pI have got approval to spend $800 on new Tunze pumps - I have also got tentative approval to buy a new camera for around $1k and here you are increasing the cost by 100% :eek:You will learn, it might not be tomorrow, but you WILL learn.