PNW Custom Shrinks an Entire Reef Controller to 3×3.5 Inches — and It Drops Today

PNW Custom Shrinks an Entire Reef Controller to 3×3.5 Inches — and It Drops Today

Harley Finberg has been building small-tank gear for years, but the Micro Reef Controller releasing today is a different kind of ambition. The device — 3 inches by 3.5 inches by 1 inch, powered by a single USB cable — handles everything a full-size controller does: sunrise/sunset lighting ramps, temperature monitoring via an external probe, and variable pump speed and flow modes. No controller rack. No cable spaghetti. No second power strip.

The unit pairs with PNW Custom's 40oz Micro Reef Tank and its 1- and 1.5-gallon Small-In-One systems, but it'll work with any setup running USB-powered equipment. The pico reefing movement — fueled in part by Jake Adams' 2022 deep-dive into building the smallest reef possible — has been waiting for automation to catch up with the hardware. Today it did.

If your excuse for not keeping a reef was "I don't have the space," you just ran out of excuses.

Gobble's Take: A reef you can manage from your phone and fit on a bookshelf shelf is no longer a gimmick — it's just Tuesday.

Source: Reef Builders

Your LFS Has Been Misidentifying These Three Corals for Decades. Here's How to Tell Them Apart.

You spot a softball-sized, pulsating coral at your local fish store. The tag says "fleshy LPS" and the price says $180. The employee calls it a "button polyp." None of that is helpful. The coral is almost certainly one of three species — Acanthophyllia, Indophyllia, or Cynarina — and which one it is matters for how you place it, feed it, and keep it alive long-term.

Reef Builders' deep-dive into all three lays out the distinctions clearly. Acanthophyllia tends toward dramatic fluorescent color and significant tissue expansion — it's the showboat of the trio. Cynarina is rounder and more uniformly inflated, with a bubble-like body that's almost cartoonishly plump. Indophyllia is the rare one, identifiable by intricate surface patterning and commanding collector prices to match. All three want the same basics: stable parameters, low-to-moderate flow, and a sand bed placement away from high-energy zones. The difference matters most at the store, where a misidentified Indophyllia might be priced like a common Cynarina — or vice versa.

Knowing which coral you're actually buying is the cheapest form of insurance the reef hobby offers.

Gobble's Take: Five minutes of homework before you swipe your card is worth more than any coral dip you'll ever use.

Source: Reef Builders

One Hobbyist Added Six Cherry Shrimp. Months Later, They Own a Shrimp Farm.

It starts innocently: a half-dozen Neocaridina shrimp to clean up algae and add some life to a planted tank. Then one day you look down and the substrate is moving. Cherry shrimp — and their close relatives, blue velvets, yellow goldenbacks, and the rest of the Neocaridina family — breed on a hair trigger when two conditions are met: enough food and no predators. In a carefully maintained planted tank, both conditions are usually satisfied by design.

The r/Aquariums community has documented this phenomenon extensively, and the solutions are well-tested. Cutting back on feeding slows breeding noticeably, since shrimp condition to breed partly based on food availability. Introducing small nano fish — ember tetras, endler's livebearers, or female guppies — creates enough predation pressure on shrimplets to keep the colony from exploding, without threatening adult shrimp. The third option: bag them up and sell or trade them. Local fish stores will often take healthy Neocaridina, and planted tank Facebook groups move surplus shrimp fast.

A shrimp colony with no natural check is not a cleanup crew — it's a livestock operation you didn't sign up to run.

Gobble's Take: Those six "starter shrimp" are not a feature of your tank — they're the management team, and they're hiring aggressively.

Source: r/Aquariums

A 2007 Coral Frag Ad Just Surfaced. The Prices Will Make You Want to Cry.

A hobbyist on r/ReefTank recently unearthed a printed frag advertisement from 2007 and posted it online. The prices listed — for species that today command hundreds of dollars per frag — landed like a gut punch for anyone who's been in the hobby for more than a few years. What once sold for the price of a fast food combo meal now routinely sells for the price of a car payment.

The shift isn't simple inflation. The reef hobby grew from a niche community into a global one, and social media turned certain coral morphs into status symbols with their own brand names and waiting lists. Supply chain disruptions during the pandemic stressed vendor operations at the same time demand was spiking — people stuck at home discovered reef tanks, and vendors couldn't keep up. Common corals like Green Star Polyps can still be found cheap or traded freely, but the market for named designer morphs of torches, acans, and LPS showpieces has become its own economy. A single torch head that sold for $30 in the early 2010s can fetch $250 today.

That 2007 ad isn't nostalgia — it's a document of how a hobby becomes an industry.

Gobble's Take: The corals didn't get rarer; the community got bigger, the Instagram accounts got prettier, and someone figured out that a catchy name is worth a $200 markup.

Source: r/ReefTank

Quick Hits

• From skeptic to obsessed in one tank: A reefer on r/ReefTank admitted they once found a popular reef aesthetic "corny" — then built one, and it became their favorite style in the hobby. r/ReefTank
• Dirted tank, day one: A hobbyist on r/PlantedTank just documented the start of their first Walstad-method dirted tank, with soil substrate capped and plants in — the slow-burn journey begins. r/PlantedTank
• Süßwassertang goes sporophyte: A rare milestone in the planted tank world — one hobbyist's Süßwassertang (a freshwater macroalgae often mistaken for a moss) successfully transitioned to its sporophyte stage, a development most planted keepers never witness. r/PlantedTank

In Case You Missed It

Yesterday's top stories:

• Three Months of Rejection, One Detached Anemone, and Two Clownfish Finally Get It
• A Minor House Fire, 69 Days of Zero Maintenance — and the Tank Was Fine
• He Put Down the Scissors for Three Weeks. The Plants Ran the Tank Without Him.
• Day 231: This Reef Bottle Has Never Had a Water Change and Won't Stop Thriving