No.  Its a 400gal FOWLER with only a huge Miniatus grouper and lots of mushrooms that grow like crazy under VHO lamps.  Techniquely not a FOWLER, but anyway...  The system is 13 years old.  I bought the BM 6 months ago and had a hard time adjusting then  There seems to be an air inlet that might be adjustable...but I haven't figured that out.  I finally got it to a depth of 4 inches and stopped the overflowing, but after a water change a few weeks ago, I can't keep it from flowing like crazy.  I'll try your suggestion, much thanks. 
		
	
		
		
		
		
		
	
		
		
	
	
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