The Bottom vertical coils in my opinion are far superior the original nautilus heads. Anyone that has the nautilus mini (which shipped with these heads) will tell you its a superior tank. I love my Nautilus mini and the price on this pack of 5 is really really cheap. A good 50% off the going rate.
"BVD" stands for bottom vertical design - but they are in fact BVC heads.
These can be used in both the original nautilus and the nautilus mini.
WHERE: >> HERE <<
$5.94 per pack of 5