Looks to me like it could be an anchor worm coming to the surface but a small fish with a large wound?..........I'd net him out and put him down. No...
Have you continued to add ammonia each day? The bacteria you have already grown needs to continue to be fed a small amount of ammonia each day until...
Also I have a 110G indoor goldfish pond,a 30G isolation tank, a 30G QT tank, a 6G bio-orb, two 10G planted tanks, a 55G molly tank, and a 250G outdoor pond. Working on building a 400 gallon at the moment.
How I got started with aquariums.:
built a pond. Pond needed goldfish. goldfish needed a tank for the winter. Wanted a pleco with the goldfish. Pleco came with free Mbuna. Mbuna dont mix with goldfish. Thus MTS begun...
Favorite fish:
My dojo loaches.
Fish I have bred:
The fish breed just fine on their own, don't need my help.
Why I like fish::
What is not to like?
Best advice:
Don't over-water your fish. Makes a huge mess.
Other pets:
3 cats, a pug, and an xbox.
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Who is "General Failure" and why is he reading my hard drive?
Not perfect though. It is a tad bit flimsy, can be rattly if its not all snug, and if the water level is low, it will rattle itself loose, making more noise, and when the filter gets clogged up, it sounds like a waterfall. Skimmer will suck up air when water level gets low, making a loud churning noise, and again, rattling things loose.
I have it running side by side with an emperor 400 and honestly aside from the bio-wheels its a better performing filter. Higher flow rate, the media is a breeze to clean, change, and setup as needed, and it starts like a champ everytime.