Ampmaster 3000 for closed loop in my 200

[Troy F]

Here's another thing to consider; Darren did tests on power consumption on the Ampmaster and both he and I called Dolphin to confirm, these pumps draw double claimed on the website (the fellow at Dolphin agreed and gave a long winded explanation).

Terry, my comments on the suspended sand was more of possible reason for the quick demise on Darren's pump. I have a 24" deep tank and have had no problem (I've taken it apart to be sure). The design of the pump is, as mentioned by Victor, questionable and I think it will be a problem down the road. The same sand that go in the Dolphin pump also got into the Gen X pump in Darren's system and caused no problem there.

I don't know if you caught it or not but I mentioned Gen X's Mak 5 as a possible substitute. It's pricey but if the quality is anything like the Mak 4 it may be worth it. I think (off the top of my head) it runs at around 2000gph and can handle head pressure.