Decision essentials
Key points
Foam also becomes a biological surface.
Floss is disposable once structure collapses.
Trapped organic matter has not left until removed.
Filtration
Pore size changes in use
Compression closes openings; poor fit lets water bypass edges. A graded coarse-to-fine sequence spreads solids through depth instead of building one dense skin.
Continuous fine polishing may not justify its service demand. Temporary use after substrate work is often more controlled.
Filtration
Restore function, not sterility
Rinse foam enough to restore passage. Replace floss that mats or cannot release debris. Avoid discarding every colonised mechanical surface together.
If particles persist, inspect circulation and bypass before adding another fine layer.
From evidence to action
Decision matrix
| Situation | What to do | Why |
|---|---|---|
| Large waste | Coarse foam | Low-resistance capture |
| Short-term haze | Fine floss temporarily | Polishes suspended particles |
| Fast flow loss | Reduce compression and inspect load | Resistance is excessive |
Check the result
After the adjustment, measure flow under the same conditions and check noise, leaks, waste accumulation and circulation. Record the result; if performance drops again, locate the restriction before changing another part of the system. For “Foam and floss: choose particle capture without choking the filter”, use trapped organic matter has not left until removed as the final article-specific check.
Evidence
Sources and scope
Sources include institutions, technical studies and manufacturers. Chezur separates established mechanisms from editorial decisions for home aquariums.