vectra m2

I bought a brand new Ecotech Vectra M2, good price on eBay that was working fine for 2 weeks. But now when I power it down and turn it back on it starts ramping speeds up and down, going from 85gph to 120gph to 240gph then dropping back down to 85gph to start the whole process again. This flow...

For sale a RedSea Reefer XXL 750 system. 160 Gal DT + 40Gal Sump = 200 Gal Total System This system was purchased four months ago and set up as a FOWLR, but I have other plans. Excellent, like-new condition, not a single scratch on glass or stand. Includes: 160Gallon - 72" x 24" x 24" Display...

Does anyone have any experience with the waterbox 170.4/5 plumbing? I'm wanting to run a Ecotech Vectra M2, but idk what fitting to use to attach it to the supplied return line... I'm sure I'm just an idiot, but any help or advice would be super helpful! Also, if I need to get a different pump...

Vectra 2 Pumps — NOW IN STOCK! M2 and L2 Vectra Pumps from EcoTech Marine Have Arrived! PLUS: Lots of news this week! Red Sea ReefLED, DC Runner G2 Pumps, & Hydros Wave Engine ...