Hiya, I'm new to this site so sorry if i make any mistakes
The problem I'm having at the minute is the water in my tank is quite murky, i recently managed to get it to quite a good stage after taking out some of the things in my tank and using Green Away.
But it's recently been getting murky again after I've added the decorations in (One is a helmet type thing which i put in the middle of the tank, the paint has been peeling a little so I was worried that might be the problem but the fish shop said it wasn't anything to worry about...)
I've been told by the pet shop not to have my tank lights on because I don't have any live plants, but my friend said he has his on about 8 hours a day. If I have the lights on any length of time the algae seems to get worse so I'm not really sure which advice to take!
Green away seems to work but i don't want to have to use it forever

I'd rather get the problem sorted.
After testing my water all the levels are fine (though I'm not sat at home atm so can't do a quick check).
Had the tank since July 09', It's 60 Gallons.
3 Mollies, 2 Platys, 1 Koi Angelfish
I change the water roughly once a week 25-30% (Not on the dot because i work shifts) and clean the gravel as i do the changes.
My fish get fed flakes mainly, but bloodworms once or twice a week.
Any advice (especially clarfication on the light times!) would be really helpful! I adore my fish and want them to be happy!