What is the background made of ? Are they coralline or some background rocks ?
I made arogrocrete and poured it over eggcrate to make panels and then siliconed the panels to the backs and sides ... they are covered in coraline and bugs now so help with nitrate reduction ... there is 450lbs of live rock plus " the wall "
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Steve
“The most important decision you make is to be in a good mood.”
― Voltaire