Biofilm
Bacterial Bloom
A milky or cloudy white water bloom caused by suspended bacteria rather than classic algae.
Quick facts
- Category
- Biofilm
- Organism group
- Bacterial Bloom
- Growth form
- Suspended
- Primary color
- White
- Secondary color
- Gray
- Attachment
- Weak
- Removal difficulty
- Easy
Identification
Cloudy white or pale gray haze in the water column, distinct from green water blooms.
- Growth form: Suspended
- Primary color: White
- Secondary color: Gray
Looks like: Unlike green water, this bloom is whitish or milky rather than green and usually points to bacterial imbalance.
Where it appears
Typical affected areas
- On Glass
Common contexts
- New Tank
- Nutrient Imbalance
Causes
Usually appears when the biological system is immature or suddenly overloaded with organics.
Most common triggers
- Microbiological Instability In New Systems
- Organic Spikes
- Disturbed Biological Balance
Root cause note: Not an algae species in the strict sense, but very relevant in a practical aquarium diagnosis library.
Nutrient relevance
Balance relevance: Medium
Related nutrient issues
- Organic Overload
The core issue is often biological imbalance and organics, not plant fertilizer balance alone.
Correction hint: Stabilize the system and avoid overfeeding or overcleaning swings.
Treatment
Quick action: Stop chasing the cloudiness with repeated drastic changes and focus on stability and oxygenation.
Time, aeration, and lower organic pressure usually solve mild blooms once the tank stabilizes.
Manual removal: Because the bloom is suspended, mechanical scraping does nothing.
Difficulty: Easy
Prevention
Cycle patiently, do not overload the tank early, and keep maintenance changes measured.
This page is designed to help with visual identification first, then causes, treatment, and prevention. Actual algae pressure can vary depending on maintenance, livestock, plant mass, light, flow, and nutrient consistency.