Mountain Tree Lotus Root Bacteria House II — Large (8 × 25 cm) — 15-Piece Box

Mountain Tree Lotus Root Bacteria House II — Large / XL (8 cm dia × 25 cm). High-capacity ceramic bio-media for serious koi ponds — a full box of 15 large rods packed with nanopore surface area to power your biological filter.

Why it works

The signature lotus-root shape — a large cylinder with seven long channels — dramatically increases water-contact area, while the porous ceramic body contains nanopores that host beneficial nitrifying bacteria (Nitrosomonas and Nitrobacter). Those bacteria convert toxic ammonia and nitrite into far less harmful nitrate — the foundation of clear, stable pond water.

What's in the box

• 15 pieces per box — total weight 10 kg (heavy-duty bio-load)
• Each piece: 8 cm diameter × 25 cm long
• Signature 7-channel lotus-root cross-section
• Mountain Tree brand (Article No. MTF218 / FM0066) — established Asian bio-media brand

Product parameters (per piece)

• Surface area: 5,404 m²/pc (4,303 m²/L)
• Opening rate: 70.5%
• Water absorption: 60–80%
• Ion data: 300–400 pcs/cm³  |  KH: 3  |  pH: 7.0–7.2  |  TDS: 20–30 ppm  |  PO₄: 0 ppm

Best for

• Large or heavily-stocked koi ponds
• Big biological chambers (bead filters, moving-bed, gravity-fed sumps)
• Show-quality water clarity where bio-capacity really matters
• Fully re-loading a biofilter after a shutdown or clean

How to use

Rinse gently in dechlorinated pond water before use (never tap water — chlorine kills bacteria). Place in the biological stage after mechanical filtration. Allow 4–6 weeks for full bacterial colonisation. Rinse only if flow drops noticeably — less is more.

Ships across Canada

• ✅ Ships within 1–3 business days
• ✅ Backed by Koi Whisperer

Heavy item (10 kg box). Shipping calculated at checkout.