Test Results for the Following:
* Ammonia Level(Tank) 0.0
* Nitrite Level(Tank) 0.0
* Nitrate level(Tank) >10ppm
* Ammonia Level(Tap) 0.0
* Nitrite Level(Tap) 0.0
* Nitrate level(Tap) 0.0
* Ph Level, Tank (If possible, KH, GH and chloramines) around 7.5
* Ph Level, Tap (If possible, KH, GH and chloramines) around 7.2-7.5
Other Required Info:
* Brand of test-kit used and whether strips or drops? API Master Kit
* Water temperature? 74 F
* Tank size (how many gals.) and how long has it been running? 55 gallon, been running since May or June 2013
* What is the name and "size of the filter"(s)? 1 Marineland Penguin 100, 1 AC70, 1 Tetra Whisper EX70
* How often do you change the water and how much? One of two ways, depending on work schedule. Either once a week 100% change, or twice a week 50-75% change.
* How many days ago was the last water change and how much did you change? Three days ago I did a 75% change, plan on doing another one tomorrow.
* How many fish in the tank and their size? 5 fish, 3 1-inch, 1 4-inch, 1 6-inch. (Yes, I am quite aware that I am overstocked, however my filtration and water change regimen has kept the water chemistry where it should be. I am planning on getting a 40-breeder for the two larger girls by the end of the year.)
* What kind of water additives or conditioners? Prime
* What do you feed your fish and how often? Ocean Nutrition Formula Two Herbivore Pellets twice daily, just enough for it to all be gone in a minute or less, once or twice daily depending on how floaty Thor is at the time. (Thor's always had some food-related floatiness, being a rather round ryukin) Once a week I will feed frozen Hikari blood worms, usually 2 of the little ice cubes melted out. On these days I do not feed the pellets, just the worms. Once a month I will feed them all peas and then fast for a day or two.
* Any new fish added to the tank? The black moor.
* Any medications added to the tank? No.
* List entire medication/treatment history for fish and tank. Please include salt, Prazi, PP, etc and the approximate time and duration of treatment. It has been about a year since my last Prazi and salt treatment, I plan on getting some more in the next month or so to do another round. I do a Prazi treatment once a year or as needed for regular maintenance, with the occasional salt treatment when someone tears a fin or scrapes a scale or something, but I've never had anything MAJOR happen. I once had to give Thor a salt dip since she was having slime coat troubles but the dip fixed it and she's never had trouble since.
* Any unusual findings on the fish such as "grains of salt," bloody streaks, frayed fins or fungus? No, the new moor's fins look excellent, no clamping, scales are all intact, no ich or any spots like that, no slime coat issues or anything, eyes are clear.
* Any unusual behavior like staying at the bottom, not eating, etc.? The baby moor likes to stay in the back right corner of the tank for most of the day. Doesn't quite bottom sit, just hovers there toward the bottom, about a half inch above the floor of the tank. He eats normally and vigorously like the others, he just doesn't mingle at all. When he does swim around the tank he looks startled? Not flashing or anything, just swims really fast like something spooked him, seems to want to stay away from the other fish.
So basically my question here is, knowing all the above, is it common for a very small fish to be scared of larger fish? He had been quarantined before I put him in there, and the place I got him from (very trusted LFS who did the quarantine for me) had him in a smaller tank. Is he just uneasy about the sudden large space he's put into? He swims pretty strongly when he does feel like moving around, seems to handle the current of the filters very well, has no difficulty getting around at all. He just looks... scared when he does swim around. There's been absolutely no bullying either, the girls have been very curious about him but have not bothered him. More just swimming over to say hi and then looking kind of confused when he zips away.
I've had him in there for three days now and this behavior has been going on for the duration of this time.