this may be a dumb qustion, but are they all the same size? not the outside because i know there are 2 bulb 4 bulb 2 foot 4 foot ect. but the liitle sqares? havent had time to go look yet
here is what i want to do. ii want to create a space at the top of my tank 4 inchs deep 14 to 18 inchs long to give some blood fin tetras a place to sleep at night so my jewel/jewels cant get to them so i would need a square big enuf for a blood fin but not the jewel/jewels. any ideas or suggs good or bad are welcome.