Hi,i'm new too the hobby.Just bought a 30x 15x12 tank complete with hood,UGF,heater,light and gravel.do i need another filter besides the UGF.
Hi John, and welcome to the forum ! Thats the same tank I had for nearly 30 years- man and boy ! LOL
Under gravel filters are unfortunatly now old hat, and better, easier to maintain... and above all more efficient filters are on the market.
Cost wise a filter could seem an expensive purchase, but given that they often last DECADES the value for money factor far outweighs any "penny pinching" at the onset...
I would recommend a cannister filter, Eheim are the top of the stack quality wise (although they made a few booboos with newer designs !) Get yourself a "classic" and it WILL last 10 years plus barring accidents. You are looking at £40-75 depending on model, which in turn depends on what you intend to keep in your tank.
If you are on a more limited budget, theres a vast choice of internal filters - £10 upwards... does the same job in essence, but hold less media and therefore allows less fish - and in my opinion look pig ugly, as well as take up valuable tank space.
You also have to disturb the tanks more when cleaning them.
So I would start afresh, and bin the UGF... Now you also have a better choice of substrate, sand for instance... and the best bit for me - NO NOISY AIRPUMP !
Good luck with the hobby... read the fishless cycle threads - it really DOES make a difference, and try not to rush - a little patience at the start makes a world of difference hassle wise.