You can use any size you like of course. Some shapes are just easier to work with.
As some of the others have said, shop around for the best parts.
Thanks for replying DogFish,
I prob have enough space for a 90l but would prefer not to spend more money on another tank. I Have a 60l and would love to make that one a planted tank.
I'm aware you need to customise the lighting set up, but I have a plastic moulded injected hood supplied new with the 60l.
What would be your opinion with upgrading the 60l aquarium? Should I get a new hood built with a new light and balast, or keep the existing one and buy the new light and balast and make it fit into the hood myself?
I'm not an electrician and worry slightly about the potential danger of mixing water with a novice electrical installation.
The tank dimensions are 60cm x 30cm(d) x 30(h)cm
Any suggestions on what lighting system to research? My existing view light is 438mm 15w and the hood only has space for one bulb and balast.
Thank you again for reading