| I always say it's best to put NOTHING on top of your tank. However, if you do have 'carpet surfer' type of fish, eggcrate is best. I've found eggcrate at Home Depot that was clear! You do want to have some way of cooling down your system. Evaporation is my friend.
Dave
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"Fins to the left...Fins to the Right, I'm going home to play with my reef tonight..."
If you're looking for me, and I'm MIA from the board, email me at JustDavidP (at) gmail (dot) com.
Experience in aquaria, 35 years. Experience in marine, 20+ years. Experience in Reef Keeping, 6 years. Always a newbie! | 
