I got a forbidden message trying to get to the photo. If you put the photo in an album here on Aquarium Advice, it'd be easier.
30% water change weekly will stress the animals who are already under stress from being in a small system. Ocean animals are not adapted for sudden changes to their environment, so changes need to be subtle. Also, 10ppm is within OK range for fish, but is an indication to keep an eye on the nitrates when dealing with other livestock such as coral. It will also up any algae blooms that could occur especially with such a large water change if you use tap water.
I have an 18 gallon reef, specs can be found in my profile. It gets a simple 10% water change every two to three weeks. It is packed with fish and inverts, but I do have an oversized refugium on it. When I had a 2.5 nano reef I did a very small water change every other day (about a betta cup full). The only filtration on it was a little Whisper
HOB internal filter with live rock rubble instead of carbon. No skimmer or refugium. The only fish in it was a pigmy angel and then a little tiny boxfish after the angel was sold. Everything else was an invert. The only reason it was taken down was because we were popping the fuse with extra electricity use from a new register system. I'll be putting another one back up soon. We sold several little tanks for nanos when it was up.
What kind of filtration do you have on yours?
I still advise to do a 3 to 5 minute freshwater dip to rid any external parasites that could be on the fish.
