SaleNew
Aquariums, livestock & aquascape
Bring the reefinto your room
Rimless tanks, healthy livestock and living plants, quarantined in our own fish room and delivered ready to thrive.
About Tidewell
The most complete aquarium shop
Tidewell began in 2012 as one rack of planted tanks in a Seattle garage. Today it is a fish room of 140 systems, a small team of aquascapers and one rule that has never changed: nothing leaves until it is healthy, eating and ready for your water.
Arrive-alive delivery
Insulated, oxygen-packed boxes, shipped Monday to Wednesday so nothing waits out a weekend.
Quarantined livestock
Fourteen days of observation and treatment-free feeding before a fish goes on sale.
Find your water
Shop by category
Glass, livestock, plants and stone: six corners of the fish room, all in stock.
Fresh from quarantine
New in the fish room
This week's arrivals, settled, eating and cleared to ship.
What we do
We build aquariums that hold the eye
From a 20-litre desk cube to a three-metre reef wall: we design it, plumb it, plant it and stay on call to keep it clear. Most of our installs are still running a decade on.
0%
Arrive-alive rate
Across every livestock order shipped last year.
0%
Maintenance renewals
Clients who keep their care plan after year one.
Tank Kit Builder
Four choices. One complete tank.
Pick a tank, the fish, the plants and the hardscape. Put the full kit in your cart together and 10% comes off at checkout, automatically.
- 01Tank
- 02Fish
- 03Plants
- 04Hardscape
0Tanks installed
0Systems in the fish room
0Years under water
0Arrive-alive rate, %
Testimonials
What our clients say
“My betta arrived in an insulated box, flaring at me within the hour. The cube was scaped in an afternoon thanks to the guide they tucked inside.”
“Three orders of coral and not one loss. They held my clownfish an extra week because the forecast was cold. Nobody else does that.”
“The plants were grown under water, so nothing melted. Six weeks later the carpet has closed over and I have not seen a strand of algae.”
“Tidewell designed and installed the tank in our studio and visit every fortnight. It is the first thing every client photographs.”
“I was nervous about discus. They talked me through the water on a video call and the six I bought are now the size of my hand.”
“The starter kit and the cycling guide meant my kids' first tank actually worked. Eight months on, every fish is still with us.”
They designed a reef for our clinic waiting room three years ago. Patients arrive early just to sit in front of it, and Tidewell still visits every fortnight.
Our news
News & articles
Guides from the fish room, written by the people who feed it every morning.
Sep 28, 2026Cycling a new aquarium, without the jargon
The six weeks before the first fish decide whether a tank works. Here is what is happening in the water, and what to do each week.
Read more
Sep 19, 2026Your first planted tank: seven plants that will not die
Start with plants that forgive low light and missed fertiliser, and add the demanding ones later.
Read more
Sep 8, 2026How to acclimate new fish in forty-five minutes
The bag-floating method is half the job. Drip acclimation does the other half, and it takes one length of airline.
Read moreNeed to know
Questions, answered
Shipping livestock, acclimation, guarantees and tank set-up. If yours is not here, the team replies within a working day.
Every fish, shrimp, coral and plant is guaranteed to arrive alive and healthy. If anything does not, send a photo of it in the unopened bag within two hours of delivery and we refund or replace it, including shipping.
#TidewellTanks
