<a href=showthread.php?s=&postid=13641685#post13641685 target=_blank>Originally posted</a> by 8BALL_99
NP, Well the Vortech does have a Random mode like your talking about besides the pulse and reefcrest. In random mode you set the min/max % and it just does what ever it wants when ever.
The Vortech has the following modes:
Reef Crest - Random relatively fast ramps up and down and you can set the maximum intensity.
Lagoon Mode - Random relatively slow ramps up and down and you can set the maximum intensity.
Short Pulse - Short pulses where you set the maximum intensity and the pulse length with a maximum pulse that is pretty short (maybe less than a couple seconds) down to a minimum of less than a second
Long Pulse - Longer pulses just like Short pulse mode, but the pulses are longer and don't ramp quite as fast on transition
Regular - one intensity all the time that you set
So there are two random modes, two pulse modes, and one "regular" mode. And then there is night mode where it drops to 50% of the 'daytime' intensity, and feed mode where it drops to pretty low for 10 minutes. This is with Gen 2 firmware.
And slave pumps can be in either sync or anti-sync modes. Sync mode makes them follow the master pump, so when it ramps up the slaves do too. In anti-sync they do the opposite, when the master ramps up, they slow down, and vice versa.
The manuals for the Vortech can be downloaded from the Ecotech marine web site, and they outline each mode.
And yes, I would say the Vortech is going to be louder than a submerged pump, but then they also don't put any heat in the tank. I'm having problems keeping my 220G warm enough with running Vortechs and my T5 lighting. Heaters are running all day to keep it at 77.5 ... Not sure if internal pumps would make that much difference, especially in cooler weather, but they do in hotter weather.