My new 75 gallon tank should be here today. I'm most likely going with a Filstar XP-3 and AQ-110 HOB for filtration. This tank will be for African's so will have a lot of rock. I'd like to hide the intakes behind the rocks but am wondering if that would make for less than ideal filtration. I'm also putting in an undergravel jet system. Is it ok for my intakes to be behind rocks or should I comprimise the looks in favor of function?