Tunze 6150. How close to sand bed?

HippieSmell · 11/30/2017, 11:20 PM

I think the manual says 8 cm, but it sounded like it was only in the horizontal position. What about vertically?

rvitko · 12/01/2017, 08:51 AM

This will vary with sand grain size, in my tank I found 5" in the horizontal position was the minimum with standard 2-3mm aragonite sand. The biggest issue is once per day the pump back flushes itself for about 20 seconds and if closer to the sand this will stir up the sand and it gets sucked into the pump when it rights the direction.

HippieSmell · 12/01/2017, 10:40 AM

Is it the propeller distance to the sand we're worried about, or the end of the pump where it sucks in water for cooling?

rvitko · 12/01/2017, 12:46 PM

Both, but in a vertical orientation the 8 cm, roughly 3" distance would be sufficient as the suction is not that strong from the bottom, where we would get into trouble in the horizontal orietation is the back flushing would stir the sand so there is suspended sand to be sucked in when the direction reverses to the normal direction.

HippieSmell · 12/01/2017, 12:58 PM

Gotcha. Thanks!

11/30/2017, 11:20 PM	#1
HippieSmell Occupy Reef Central Join Date: Jun 2004 Location: Orbiting Posts: 4,141	Tunze 6150. How close to sand bed? I think the manual says 8 cm, but it sounded like it was only in the horizontal position. What about vertically? __________________ Time flies like an arrow. Fruit flies like bananas. Current Tank Info: 78"x36"x27" acrylic, 6 Orphek Atlantik V3+ Compacts, MRC Orca Pro II w/washdown, CalcFeeder Pro AC3, Emperor Aquatics 80w UV, 80/20 aluminum stand, Vortech MP60's, Theiling Rollermat, GHL Profilux 3.1T EX, Kessil H380

12/01/2017, 08:51 AM	#2
rvitko RC Sponsor Join Date: Apr 2000 Location: Austin Texas USA Posts: 35,785	This will vary with sand grain size, in my tank I found 5" in the horizontal position was the minimum with standard 2-3mm aragonite sand. The biggest issue is once per day the pump back flushes itself for about 20 seconds and if closer to the sand this will stir up the sand and it gets sucked into the pump when it rights the direction. __________________ Roger Vitko Tunze USA "He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!" Current Tank Info: 210 gallon planted tank with Altum Angelfish

12/01/2017, 10:40 AM	#3
HippieSmell Occupy Reef Central Join Date: Jun 2004 Location: Orbiting Posts: 4,141	Is it the propeller distance to the sand we're worried about, or the end of the pump where it sucks in water for cooling? __________________ Time flies like an arrow. Fruit flies like bananas. Current Tank Info: 78"x36"x27" acrylic, 6 Orphek Atlantik V3+ Compacts, MRC Orca Pro II w/washdown, CalcFeeder Pro AC3, Emperor Aquatics 80w UV, 80/20 aluminum stand, Vortech MP60's, Theiling Rollermat, GHL Profilux 3.1T EX, Kessil H380

12/01/2017, 12:46 PM	#4
rvitko RC Sponsor Join Date: Apr 2000 Location: Austin Texas USA Posts: 35,785	Both, but in a vertical orientation the 8 cm, roughly 3" distance would be sufficient as the suction is not that strong from the bottom, where we would get into trouble in the horizontal orietation is the back flushing would stir the sand so there is suspended sand to be sucked in when the direction reverses to the normal direction. __________________ Roger Vitko Tunze USA "He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!" Current Tank Info: 210 gallon planted tank with Altum Angelfish

12/01/2017, 12:58 PM	#5
HippieSmell Occupy Reef Central Join Date: Jun 2004 Location: Orbiting Posts: 4,141	Gotcha. Thanks! __________________ Time flies like an arrow. Fruit flies like bananas. Current Tank Info: 78"x36"x27" acrylic, 6 Orphek Atlantik V3+ Compacts, MRC Orca Pro II w/washdown, CalcFeeder Pro AC3, Emperor Aquatics 80w UV, 80/20 aluminum stand, Vortech MP60's, Theiling Rollermat, GHL Profilux 3.1T EX, Kessil H380