no never have any problem with foil..if you put the foil between the lid cover and light you should be all set. make sure the foil are NEW and CLEAN.
beat me to the punch.dmopar74;2368758; said:electrical tape on the glass under the light works well, construction paper works, but the best thing i came up with is those colored plastic peechee's from office depot. just cut em to fit and there are alot of different colors that allow you to "tint" the light to get diferent effect's.
cepon3;2371163; said:Use wax paper : ).. fold it over and over again untill it dimms the light to the desired level.. Btw i use it on my tank to diffuse the lights.. i know you have seen what my tank looks like so that should give you an idea.. From me to you, the best advice i can give you is: Put a flowerpot in the tank with a couple of fake plants in the corners, dim your lights and feed your Piranha krill.. has turned my brandtii into a complete monster..