putting together everything for my 55 gallon reef build and have been trying to figure out if i want to leave it open top or glass top. if i use glass will it cut down on the intesity of my 4 bulb t5's. any input or opinions one way or the other would be greatly appreciated.
I like open top. Better gas exchanges like someone said earlier. Plus using a top depending on the material can lower your par. Plus you will be cleaning the top constantly our the buildup will lower your par. I currently use the checkers eggcrate light diffuser material but I am going to switch to clear screen material sold by bulkreefsupply because the eggcrate is lowering my par too. Some people say with a open top you get salt all over the room. I have yet to notice this. Maybe around the tank like on equipment but I constantly wipe stuff down anyways
I have a two piece top that I can open or close. If its hot I open half then close it at night when it cools in the winter its down most of the time. With an open top your going to have a lot of evaporation, salt creep, fish could jump out.