Can I keep fish in a PNW Custom tank?

Yes, with size-appropriate expectations. • 1–1.5 gallon tanks: inverts and corals, single goby under 2" such as a Green Banded Goby • 3–5 gallon tanks: one or two small fish max, such as a Clown Goby or similar small fish We design our tanks to prioritize long-term health, not overcrowding.

What livestock should I avoid in PNW Custom tanks?

We recommend avoiding: • Large or fast-swimming fish • Aggressive or stinging corals without spacing • Animals that require heavy feeding If you’re ever unsure, we’re happy to help you choose livestock that will succeed long-term.

Livestock Education

Stocking Your Desktop Aquarium
with Confidence

This page is your go-to resource for understanding what livestock works best in small tanks, how to stock responsibly, and how to set yourself up for long-term success with your PNW Custom aquarium.

Why Livestock Choices Matter in Small Aquariums

Saltwater aquariums are all about balance. Because water volume is limited, every livestock choice has more impact, which is why thoughtful stocking is far more important than stocking more.

To support livestock, our tanks are designed with:

Efficient top-to-bottom filtration
Controlled flow and oxygenation
Intentional layouts that prioritize livestock comfort

Download Our
Invertebrate and Fish Compatability Charts

Ready to add invertebrates and fish to your aquarium but unsure what types you can add? Reference these compatibility charts.

DOWNLOAD (FISH)

DOWNLOAD (INVERTEBRATES)

Livestock Questions

PNW Custom tanks are intentionally designed for small, carefully selected livestock. The best choices include: • Soft corals (zoanthids, mushrooms, leathers) • Select LPS corals • Macroalgae (especially in our Macro Mini Pond) • Invertebrates like snails, hermits, shrimp, and micro brittle stars These animals thrive in stable, low-volume systems when paired with proper filtration and maintenance.