Possible Bacteria Bloom

AxieTails

New member
Joined
Oct 13, 2016
Messages
26
Reaction score
1
Points
3
Location
Oregon
Country
United States
Hello all,

I did a water change last night and am worried there might be a bacteria bloom going on in Neo's tank. I've never dealt with this before so I was hoping to get some second opinions.

Tank setup: I've had this tank for years. It's a 20 gallon with sand and artificial decorations. I use a Tetra Whisper Filter with bio bag filter cartridges. I treat the water with Seachem prime and add a mineral solution similar to Holtfreter's. I usually do a 9 gallon water change ever 2 weeks. For about a month I've also been using an aquarium chiller, a cheap one by Poafamx. It has a small pump I kept submerged near the top of the water level. I had it set to keep her between 65-68 degrees Fahrenheit (18-20C)

Last night I noticed an off white slimy film inside of the chiller tubes and the filter. I'm embarrassed to say the bio bag looked quite filthy, it was very brown and slimy.
I continued with the 9 gallon water change, scrubbed the filter with primed water, removed the chiller, and have been keeping Neo tubbed out of caution (She has a towel covering one side, a small fake plant and I change the water 100% around every 12 hours). The filter has been running with a fresh bag for a little over 12 hours and the water still looks a bit blurry. I've also noticed white chunks, which I'm assuming are bacterial debris since none of her food is white.

I just tested the water, coming out to this:
Ph - 8.0, Ammonia - 0 ppm, Nitrite - 0 ppm, Nitrate - 5.0

Is it possible that the bacterial overgrowth is just from the bacteria taking advantage of all the new surface area in the chiller?
I've looked at a few other threads and saw a people saying further water changes at this point can exacerbate bacterial blooms, so my plan was to keep her tubbed until the water seems to be staying clear. Before I add the chiller back in I plan on flushing it by running a mixture of primed water and vinegar, then with just primed water to rinse. Does this seem like a good course of action?

Thank you for reading this far. I'll attach some photos.
 

Attachments

  • 20250923_010159.jpg
    20250923_010159.jpg
    1.4 MB · Views: 11
  • 20250921_222147.jpg
    20250921_222147.jpg
    2 MB · Views: 8
  • 20250923_010825.jpg
    20250923_010825.jpg
    2 MB · Views: 9
  • 20250923_013641.jpg
    20250923_013641.jpg
    693 KB · Views: 8
  • 20250923_010123.jpg
    20250923_010123.jpg
    978.6 KB · Views: 9
General chit-chat
Help Users
  • No one is chatting at the moment.
    There are no messages in the chat. Be the first one to say Hi!
    Back
    Top