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Pine Stumps in Fish Ponds: Safe for Fish?

Placing pine stumps in a small fish pond for cover is harmless to fish. Conifers like pine are commonly used in pond habitat structures. Only walnut wood contains juglone, a chemical toxic to fish. Pine stumps provide shelter and surface area for beneficial organisms.

Safe Habitat Materials

Pine, spruce, fir, cedar stumps and branches.
Christmas trees (recycled).
Avoid walnut, butternut, and related species.

Trees: Pine Needles vs. Native Grass: Rake or Keep?; Pine Cone Absence in Massachusetts: Not Necessarily a Problem; Mass Pine Removal After Beetle Infestation: Stump Management and Agency Help; White Pine Blister Rust: Girdling Gall = Tree Doomed; Identifying a Tree with Round Cones & Tiny Needles: Bald Cypress; Identifying a Pine Tree from a Photo; Koi Flashing and Ulcer: Parasite Treatment Protocol; Overwintering Pond Goldfish: When to Bring Them Inside; Pond Volume & Pump Size Calculator; Moving Feeder Goldfish Indoors for Winter: Tropical Tank Risks

Garden Articles

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New Pond, Minnows/Tadpoles Added, Then Koi Die: Well Water Toxicity?

Plants

Norfolk Island Pine Roots: Safe at 5–6 Meters

Heavy Cone Production on Ponderosa Pine Indicates Stress

Pines with 5 Needles per Bundle: Species Guide

Protecting Loblolly Pines from Bark Beetles in Houston

Propagating a Sentimental White Pine from Seed

Managing Neighbor's Pine Tree Roots Encroaching Your Yard

Using Walnut Hulls as Fish Poison in Ponds