Originally Posted by Nano Reefer
which should i get?
I have the exact same tank with MJ1200. The water current is strong, but my anemones love it! And I do not have the problem with sand at all (powerhead facing right to the front). One thing you need to be aware of is that since MJ1200 has very high gph, that also means it will suck in more water in the 3rd chamber than MJ900. The air bubbles came out so often that you would not be happy. This problem is solved when having my chiller installed (water goes out from the 1st chamber with the original pump I replaced with MJ1200, and returns into the 3rd chamber).
Several problems you might want to know about bio-cube 14:
1) excess heat from the light (mine was 85~91F constantly...) -- solved by installing chiller
2) air bubbles produced when using MJ1200 -- solved by having water returned from chiller
3) powerhead replacement is hard to find (I cannot find the splitter that can fit the original hole, still looking for solutions
4) external refugium is almost impossible without drilling holes on your tank
p.s. MJ1200 WILL fit in the 3rd chamber. Just need to take time to adjust the angle of the motor.