Thomas' Reef Tank Build

Your second reef aquarium is where experience starts to shape the build from the very beginning. Instead of learning how to reef, you’re learning how you reef: what kind of maintenance routine fits your schedule, what gear you trust, what livestock you want to keep, and what kind of system will support your long-term goals.

Rather than telling you exactly what to buy, this series is about showing you the questions, tradeoffs, and planning process that lead to every decision. If you're planning your next reef tank, especially an SPS-dominated reef, this series will help you build with intention from day one.

Thomas from BRStv

About Thomas

Thomas is a long-time reef aquarium hobbyist and familiar face from BRStv known for making saltwater aquarium care easier to understand. Through years of hands-on experience with reef tanks, equipment, livestock, maintenance, and troubleshooting, Thomas brings practical hobby knowledge to every build he takes on.

In this series, Thomas applies that knowledge to a real reef tank build from start to finish, sharing not only what he chooses for the system, but why those choices matter. Along the way, he highlights the questions, trade-offs, and goals that help shape a reef aquarium around the way you actually reef.

Episode Guide

Episode 1: Build Your Next Reef Backwards

Thomas introduces the mindset behind this build: using the lessons from a first reef aquarium to plan a second system with more confidence, more intention, and a clearer goal from the start.

Starting a second reef tank is completely different from starting your first. Instead of making decisions as you go, experience gives you the opportunity to work backwards from the reef you actually want to build.

In This Episode

  • Why a second reef aquarium gives you the chance to build with more confidence and intention.
  • How defining your reefing goals early helps guide better equipment and livestock decisions.
  • Thomas’ plan for an SPS-dominated reef with fish, clams, select LPS, and soft corals.
  • The importance of balancing automation, redundancy, maintenance, and available space.
  • Why choosing the right aquarium footprint is the first major decision in the build.

Episode 2: Choosing Your Reef Tank's Canvas

Choosing the right reef tank starts long before picking a brand or model. In Episode 2 of Thomas’ reef build, he works backwards from his SPS reef goals, filtration preferences, maintenance habits, available space, noise requirements, and automation plans to determine exactly what the aquarium needs to do.

From there, he explains why the UNS R120 Peninsula ultimately became the strongest fit for the build, including its spacious sump, controller cabinet, easy maintenance access, sleek design, and room for future equipment.

In This Episode

  • How available space influences the entire reef tank plan.
  • Why aquarium dimensions matter for aquascaping, flow, and coral growth.
  • What Thomas is looking for in a tank for an SPS-dominated reef.
  • How the right aquarium choice can support the build instead of limiting it later.

Episode 3: Get the System Running

Before sand and rock go into the aquarium, Thomas gets the system ready with saltwater, circulation, and stable temperature. In Episode 3, he explains how reliability, maintenance, value, and future controller integration guide his equipment choices for the UNS R120 Peninsula.

He walks through his EcoTech Marine Vectra M2 return pump, an Inkbird Wi-Fi heater controller paired with two BRS titanium heating elements, his RO/DI setup, and Tropic Marin Pro-Reef salt. Before calling the system ready for rock, he checks for leaks, adjusts the drain, and tests how the sump handles water draining back when the return pump shuts off.

In This Episode

  • How drain capacity, sump space, plumbing connections, and noise help determine the right return pump.
  • Why Thomas chooses the Vectra M2 with future Apex integration and battery backup in mind.
  • How two heating elements, a dedicated heater controller, and future Apex backup add layers of temperature protection.
  • Why his well water makes a seven-stage RO/DI system with separate cation and anion resin stages a practical choice.
  • How his target reef parameters and saltwater storage routine lead him to Tropic Marin Pro-Reef salt.
  • Checking salinity, plumbing, drain operation, and sump capacity before adding sand and rock.

Episode 4 Coming Soon!

Stay tuned for the next episode where Thomas will choose rock and build the aquascape!

If you're craving more reef tank builds, check out Matthew's 12-Episode My Way Series.