1970 E County Line Rd, Unit A, Highlands Ranch, CO 80126
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December 20, 2017 - Happy Holidays!

Neptune's Holiday Hours

If you're looking for that last minute holiday treat for the aquarist in your life Neptune's is stocked up, and we have gift certificates too! Hope your holidays are amazing!

November 22, 2017 - Happy Thanksgiving

Happy Thanksgiving from Neptune's!

We're thankful for our wonderful customers supporting our business for 30 years! Stop in and see us for Black Friday (hours 10am - 7pm) and Shop Small Saturday (hours 9am - 5pm). We'll be running some fun specials. Hope you all enjoy your family and friends this Thanksgiving!

June 17, 2017 - Seahorses

Neptune's has Seahorses back in stock!

Neptune's has farmed hippocampus erectus back in stock! We also have some gulf coast dragon pipefish, also captive raised.

May, 27, 2017 - Memorial Day Hours

Neptune's will be Closed Memorial Day

Thanks to all who sacrificed to make our freedoms possible!
Enjoy the official start of summer!

May 13, 2017 - Plants

Tropica 1-2-Grow Plants

Neptune's just received a huge order of Tropica 1-2-Grow tissue culture plants.
These plants are grown in their individual cups to avoid pest algaes and snails.
Come in soon for the best selection!
Makes a unique Mother's Day gift

May 1, 2017

New Kessil A80 Tuna Sun

Thanks to Kessil for our new demo unit of the A80 Tuna Sun!
We look forward to seeing how our plants grow under this compact LED.

April 26, 2017

Aquatic Gardeners Convention this weekend!

See for more information

AGA 2017

Dec. 19 - HolidayHours
Santa hours 2016

Feb. 15, 2017 - Seahorses are back at Neptune's!

We have 22 hippocampus erectus and they are eating frozen mysis like crazy! Come check them out.
Oct. 26 - CAS Fall Auction 2016 - Admin
It's that time again – the Colorado Aquarium Society's Fall Auction is this weekend, October 29th. Please note they have a new location this year!

 Poster for October-Fish Store in Highlands Ranch CO
Sep. 17 - BioCube Special!!! - Admin
We've got an amazing deal on a closeout of the Coralife BioCube 29 gallon setups with Power Compact lighting for only $199. If you've wanted to experience saltwater, but have a limited budget, this sale is for you! Limited to stock on hand as it is a closeout sale.
Poster for September-Fish Store in Highlands Ranch CO
Sep. 14 - New Coral Supplier For Neptune's Tropical Fish - Admin
We just received our first order from a new coral supplier, so stop on in and see what's here!
May 27 - Happy Memorial Day Weekend! - Admin
A big THANK YOU to all our service men and women, both past and present, for their sacrifices for our freedoms and the reason for our holiday. If you are still in town, Neptune's has a great selection of fishes and corals to stock your aquarium this weekend before the big BBQ. We will however be closed on Monday so our staff can enjoy time with family and friends. Have a fun and safe weekend!
May 16 - Killifish Convention Coming To Denver! - Admin
The American Killifish Association is holding their annual convention in Denver this year May 27 – May 29. Find out more details at
May Poster-Fish Store in Highlands Ranch CO
May 08 - Happy Mother's Day! - Admin
Thanks to all the moms out there for all you do! We'll be open our regular hours from 12 to 5 this Sunday, so bring mom in for a new fish or coral to help celebrate her special day.
Feb. 25 - Don't Forget Reef - Admin
Don't forget Reef Stock is here this weekend! Lots of things to see, great raffles, wonderful speakers, so don't miss the opportunity to hang out with your fellow aquarists.
February-Fish Store in Highlands Ranch CO
February Poster-Fish Store in Highlands Ranch CO
Feb. 12 - Reef Stock 2016 Coming Soon - Admin
Reef Stock 2016 is here February 27-28th. Don't miss this opportunity to visit with other aquarists, see some cool products, and maybe even learn a thing or two! Visit for more details.
Feb. 05 Super Bowl Sunday - Go Broncos - Admin
Hooray for the Denver Broncos attending the 50th Super Bowl game! We don't do it often, but Neptune's will be closing early this Sunday, February 7th, at 3 p.m. so our staff can go cheer on the Broncos and enjoy the game with friends and family. Go Broncos!