FishLinkCentral
Aquarium Advice From Someone Who Actually Keeps Fish
FishLinkCentral is an aquarium gear review and setup guide written by Marina Holt — a Portland-based aquarist with 15 years of experience keeping freshwater and saltwater tanks from 10 gallons to 180 gallons.
Honest Aquarium Reviews for Real Hobbyists
Every product recommended on this site has been tested in a running tank — not pulled from a box and photographed for a review. I run filters for six months before writing about them. I test heaters through a full winter before recommending them. I keep corals alive under lighting systems before telling you what spectrum actually works. If I have not run it in a tank I say so.
Guides by Tank Type
Setup advice and gear recommendations built around specific tank types and the challenges each one presents.
Freshwater Community Tanks
Filters, heaters, lighting, and substrate for planted and community freshwater setups. Built around real tanks run through multiple seasons in a Portland basement.
Saltwater Reef Tanks
Skimmers, dosing, lighting, and flow for FOWLR and reef systems. The equipment that kept corals alive through power outages, temperature swings, and parameter crashes.
Betta Fish Care
The complete guide to betta tank setup, filtration, heating, and feeding. Built around years of keeping bettas in everything from 5-gallon planted tanks to 20-gallon community setups.
Aquascaping and Planted Tanks
CO2 systems, lighting spectrums, fertilizers, and substrate for high-tech planted tanks. What actually grows plants versus what just looks good in marketing photos.
Shrimp and Nano Tanks
Filtration, remineralization, and parameters for neocaridina and caridina shrimp. The equipment that keeps shrimp colonies thriving instead of crashing.
More Guides Coming
Cichlid tanks, African rift lake setups, and more tank type guides are in progress. Check back regularly.
Setup Guides
Everything you need to build a healthy tank from scratch — from your first 10 gallon to your first reef.
Freshwater Aquarium Setup Guide
The complete beginner guide to cycling, filtration, heating, and stocking a freshwater tank. Built around real setups run through full nitrogen cycles with real fish.
Saltwater Reef Tank Guide
The complete guide to setting up a reef tank — from live rock and sand to skimmers, dosing, and coral placement. What no one tells you until your first tank crashes.
Browse by Equipment Category
Looking for something specific? Every category has been tested in a running tank.
Who Writes This Site
My name is Marina Holt. I live in Portland, Oregon and I have been keeping freshwater and saltwater tanks since 2009. I currently run four tanks including a 90-gallon mixed reef, a 40-gallon breeder planted tank, a 20-gallon neocaridina shrimp colony, and a 10-gallon betta display tank.
I do not accept payment for coverage. I do not write about equipment I have not run in a tank. When something fails — and things fail — I say so by name and explain exactly how it failed. That standard exists independently of whether this site earns a dollar.
Years Keeping Fish
Products Tested
Active Tanks
Paid Reviews
How This Site Works
Tank Tested Only
Every product I recommend has been run in a live tank. Filters get six months of runtime before I write about them. Heaters get tested through a full winter. Lighting gets evaluated over a full coral growth cycle.
Honest About Failures
Every product recommendation includes at least one genuine weakness found during real use. Equipment fails in this hobby — pumps seize, heaters stick, skimmers flood sumps. The failures are where the real value is.
Affiliate Disclosure
Product links on this site go to Amazon and earn a small commission. It costs you nothing extra and does not influence what gets recommended. See the full disclosure policy.
Recent Reviews and Guides
The latest equipment reviews, comparisons, and setup guides from the tanks.
Best Canister Filters for Planted Tanks
Tested across a 40-gallon breeder planted tank over six months. The filters that maintained flow, held media, and survived impeller clogs without flooding the stand.
Best Protein Skimmers for Nano Reef Tanks
Tested in a 30-gallon mixed reef over four months. The skimmers that pulled consistent dark skimmate without overflowing the collection cup every three days.
Best LED Lights for Coral Growth
Tested across SPS, LPS, and soft corals in a 90-gallon mixed reef. The lights that grew coral versus the lights that just looked impressive in demo mode.
Not Sure Where to Start?
The setup guides on this site are built around specific tank types and the challenges each one presents. A freshwater community tank needs completely different equipment from a saltwater reef. Find your tank type and start there.