I just need bear in mind that you refer to us gals which is 3.8l whereas ours over here is 4.5l. I have sourced a variable pump which will give me max 1000l/h and min of approx. 400l/h, but think I will go for the next model up, the Vecton 400 and a pump with max 1350l/h, min approx. 600l/h.
Whats are your thoughts on this?
Curse the US education system for not being in sync with the rest of the world... This is all dependent on your strain of Dinos. Assuming you have Ostreopsis. The 400 has less wattage than the 300, i would be interested in seeing the actual size of the sterilizer and the bulb within, perhaps they get away with having a larger housing which means more contact time. If you did go with this you would need to strive for about 400l/h but again depending on your total system volume this may not be enough flow to ensure you have turnover of the water column. I am at about 500l total system including my sump, and 200gph/ 750l/h is what did it for me.
Be sure to do more than just buy the UV and pray that it works. If i were you I would be blowing it off as much as I could and changing my socks a few times a day.
If you havent already make sure your N is about 10, and you P is about 0.08
My normal routine was Stir up the sand bed, then blow it off the rocks.. wait 15 minutes, if more dinos, blow off again.. the process would repeat until I hit a 15 minute interval with none reattaching, then and only then I would change my socks. I did this at least once a day, if not twice. Yes it sucks, but man I was determined