I was thinking of making a DIY background for my 90 gallon. I might try a Styrofoam/concrete background but, one of the concerns I have is, the down time of the aquarium (I don't want to wait weeks/months for the ph balance to lower due to the concrete) Has anyone tried or has any input in...

Last week I stopped by my local indy aquarium shop and picked up a couple of feet of plasticized aquarium backdrop. The very nice (and knowledgeable) shop owner strongly suggested I also purchase a product called "SeaView" for mounting the backdrop to the back of the aquarium. $7.99Can for 1...