WIO - Mcdonald Lake Boulder

McDonald Lake Boulder Boxes

McDonald Lake Boulder is a rare, naturally colorful river stone featuring deep reds, maroons, greens, blues, and blacks. Its smooth, river-polished texture and rich mineral gradients recreate the striking, multicolored character of glacial riverbeds — bringing depth, realism, and bold natural beauty to any aquarium or terrarium.

Available Sizes
Mega Box – 46 lb (21 kg)
Available per pound too

Why You’ll Love It
✓ Rare, naturally colorful boulders with multi-tone mineral gradients
✓ Deep reds, greens, blues, blacks, and maroon tones for dramatic scapes
✓ Smooth river-polished texture for authentic riverbed layouts
✓ Ideal for nature-style and biotope aquariums
✓ Complements plants, wood, and neutral or sand-based substrates
✓ Available with matching McDonald Lake Nano Boulders and gravels

Design Tip
Use brighter stones in the foreground and darker tones in the background to create natural depth and perspective. Pair with river-style sands and gravels to echo the aesthetic of Glacier National Park streams.

Specs & Care
Stone Type: Natural mixed-origin river stones
Color: Red, maroon, green, blue, black
Texture: Smooth, river-polished with mineral gradients
Size Range: 4"–12" (10–30 cm) (larger stones available upon request)
Effect on Water: May slightly raise pH and hardness

Rinse thoroughly and brush off loose sediment. Place stones over substrate or LandForms to protect aquarium glass. Secure stacked pieces with ScapeBound adhesive. Leave a gap between stones and glass for easier long-term maintenance. If hardness increases, perform regular water changes with soft or RO water.

Safe for all fish, shrimp, and terrarium animals.