MP40s at 20%... do you get any speed variations?

benj2112 · 04/23/2019, 06:11 PM

I am trying to get my 2 MP40s set so I have minimal sand bare spots. I am wondering if I set them at 20% (which I believe I read was the minimum for control even if you set them lower - am I wrong on that?), do I get any speed variation with the different programs like tidal swell or reef crest?

I am currently having a heck of a time getting them set so I don't have a bare spot after 24 hours or so in front middle of my tanks (4ft 120 gallon). I have special grade Caribsea sand, which I was hoping would minimize bare spots.

Thanks for any info or tips/advice.

ryeguyy84 · 04/23/2019, 06:14 PM

How low do you have them in the tank? My 40s are at 80% on my 90g

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benj2112 · 04/23/2019, 06:21 PM

A few inches from the top waterline.

ryeguyy84 · 04/23/2019, 06:35 PM

Hmm is this sand new?

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benj2112 · 04/23/2019, 06:43 PM

Yes, it is newer sand. The tank has only been up for a few few months.

04/23/2019, 06:11 PM	#1
benj2112 Registered Member Join Date: Feb 2004 Location: Minnesota Posts: 27	MP40s at 20%... do you get any speed variations? I am trying to get my 2 MP40s set so I have minimal sand bare spots. I am wondering if I set them at 20% (which I believe I read was the minimum for control even if you set them lower - am I wrong on that?), do I get any speed variation with the different programs like tidal swell or reef crest? I am currently having a heck of a time getting them set so I don't have a bare spot after 24 hours or so in front middle of my tanks (4ft 120 gallon). I have special grade Caribsea sand, which I was hoping would minimize bare spots. Thanks for any info or tips/advice.

04/23/2019, 06:14 PM	#2
ryeguyy84 Registered Member Join Date: Mar 2011 Location: New Jersey Posts: 2,753	How low do you have them in the tank? My 40s are at 80% on my 90g Sent from my SM-G950U using Tapatalk __________________ Current tank: 90G mixed reef. Current Tank Info: 90 gallon

04/23/2019, 06:35 PM	#4
ryeguyy84 Registered Member Join Date: Mar 2011 Location: New Jersey Posts: 2,753	Hmm is this sand new? Sent from my SM-G950U using Tapatalk __________________ Current tank: 90G mixed reef. Current Tank Info: 90 gallon

04/23/2019, 06:21 PM	#3
benj2112 Registered Member Join Date: Feb 2004 Location: Minnesota Posts: 27	A few inches from the top waterline.

04/23/2019, 06:43 PM	#5
benj2112 Registered Member Join Date: Feb 2004 Location: Minnesota Posts: 27	Yes, it is newer sand. The tank has only been up for a few few months.