So, I'm newly back into saltwater, and am once again overwhelmed by options. I recently picked up a 100 gallon corner tank It's about a 10 year old tank that he said was professionally maintained, and I'm certain he didn't maintian it cause he seemed to have no idea on how the thing actually ran. - I estimate it's got about 75 lbs of live rock, a half a dozen smaller fish by far the largest is a blue tank about 4" long, and perhaps 15-20 lbs sand. My sump is I think kind of old-style as it's pretty similar to what I had 20 years ago. A little filter pad, (7x13) that I clean every other day, a section of bio balls, a protein skimmer, and I've added a canister purfiltrum. Generally my levels are pretty good... no ammonia, no nitrites, low phosphates but man do I have tons of nitrates. After I moved everything I tested the water with a brand new api test kit and had 100+ ppm nitrates. So three 50% water changes I'm down to 20 ppm, I don't think my system is really very well setup for long term as I'd really like to add some corals to the tank. I need to go buy more salt to do more changes, but this could get expensive if I'm constantly changing out 50 gallons in the system. What should by nitrate goal be? I took a tour of a reef supplier in the cities - Bulk Reef Supply and they were really helpful, but I came away a bit confused as to my options. I had been considering either adding some porous ceramic blocks - replacing my plastic bio-balls with ceramic ones or even looking at the nitrate reactors. The guy giving me the tour did say that the nitrate reactors basically require daily dosing so I don't think that's for me. on the way out... I noticed some devices I'd never seen before, and I think perhaps they were a couple of the perhaps older turbo scrubbers but he said they like them but don't carry them. We try to feed pretty sparingly, a little frozen shrimp cube a day (3g) plus a few pinches of pellets (all gone within a minute) plus a few square inches of sea veggies from two little fishies - gone within 30 minutes So now what say you all on these scrubbers?? Are they a good fit for my system, What size is recommended? I can post a pic of the space I've got available but it looks like the current design requires the scrubber to be mounted above the aquarium (not asthetically pleasing in my setup) or over the sump - I think I may be able to make it work, but it may be a tight fit especially for the routing maintenance. My sump is mounted in the stand under the aquarium, and I have no ability to mount anything in a different space. Do you think I'll still need the protein scrubber? I suspect so, but looking for input. Do you think adding a ton of the porous ceramic block and balls may be enough to better handle my nitrates? They're kind of expensive so I'd rather skip this step if it's not really going to solve my issue.