ADA Bacter 100
Dormant microbial powerhouse to optimize substrate biology and stabilize your aquatic ecosystem
Product Overview
ADA Bacter 100 is a high-grade substrate additive composed of over 100 species of beneficial microorganisms in a dormant, spore-like state. When introduced into your aquarium’s substrate, these microbes gradually “wake up,” colonize the soil strata, and contribute to nutrient cycling, organic matter decomposition, and overall substrate health.
Bacter 100 is part of ADA’s Substrate System line, intended to create an ideal subterranean environment for planted tanks.
Key Features & Benefits
100+ microbial strains in dormant form
Delivers a broad and diverse microbial “seed bank” that can establish beneficial communities in substrate and water.
Enhances substrate ecology
Improves the overall condition of the substrate by helping break down organic compounds, stabilize nutrient flux, and maintain microbial balance.
Helps suppress blue-green algae (BGA) / cyanobacteria
ADA suggests that applying Bacter 100 over exposed substrate or to zones affected by BGA can help inhibit its growth by promoting beneficial microbial competition.
Flexible application: base layer or water addition
The product can be sprinkled beneath the planting substrate at the time of setup, or later introduced into the water column as needed to re-seed microbial activity.
Supports long-term ecological stability
Over time, the microbial communities help buffer substrate chemistry, improve nutrient turnover, and resist unwanted nutrient “spikes.”

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