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The nano's aren't even close to the Mp40, In fact the Mp10 smokes them! All around!
Nano 6055 is 2.7" - Mp10 2.5" Mp 10 width is smaller and way smaller the other way
Nano 6055 1,453gph - Mp10 1,575 gph Mp10 pushes more water
Nano 6055 is $ 227 just for the pump! Mp 10 is only $...
You have a 90, is it 4' ? If so id go wit the mp40 not the 10. I have 2 in my 215 - 6' and could use 2 more. Great pump! Like it better than the tunze cause there is no cord in the water. Very pricey though :o
They should say acrylic safe on them, or for acrylic. Be sure you don't get any sand between them with your acrylic tank, it scratches much easier than glass. Prob a good idea to take them out between cleanings
I'd go with 2- mag 12's or 1- mag 18. Id do internal if i were you. I have an external cause i need to push water up from the basement so it wasnt an option for me. With internal if somethin happens your water stays in the tank. And with 2 pumps theres no panic to get one if one of them fail. I...