Slow deaths when you feed often
This looks like: organic overload — bacterial bloom, low oxygen pockets, climbing nitrate
Why this happens
Uneaten food and fine poop fuel heterotrophic bacteria that cloud water and chew oxygen. Nitrate creeps while fish breathe harder than tests suggest.
What to do right now
- Halve portions for a week — feed what fish finish in 30–45 seconds, once or twice daily max.
- Siphon visible detritus from plants and carpet zones during the next water change.
- Do two 25% changes this week with matched, dechlorinated water to export nitrate safely.
- Adjust filter return to ripple the surface slightly — not a wave pool.
- Use the stocking calculator to ensure you are not over the practical limit for your volume.
What not to do
- Don’t add “bacterial starters” every week instead of feeding discipline.
Stop it happening again
Feed only what the fish finish in under a minute, once or twice a day, and skip a day each week. Most tank problems trace back to overfeeding.
If that doesn’t fix it
If fish still waste away, consider internal tapeworms or TB — rarer, photo and timeline matter.
Catch this earlier next time — log your water parameters in App-aquatic. Free forever.
This isn't veterinary advice - it's a directional read to help you decide your next step, based on the most common causes. We can't see your fish, so pair it with a liquid test kit and clear photos, and see an aquatic vet or a trusted local fish shop for a valuable or seriously ill fish.