
Colorado Aquarium Society
Upcoming Events
Announcements
Our Next Monthly Meeting is Friday, October 2
Meetings are free and open to the public.
Presentation - Toe Dipping in Salt Water
Presenter - Carol Mauch
Over the years we have heard many people who felt intimidated to start a saltwater aquarium. No matter how many times we say how easy it is, this evening Carol is going to give a hands-on demonstration on how to start a saltwater nano. It's simpler than you think. Come an join us. You might go home with some goodies to start your own salty tank!
Join us at 7:00 pm for something fishy. Enjoy fellowship, participate in the bowl show, and start a bidding war at our monthly mini-auction.
Hope United Methodist Church - Fellowship Hall
5101 S Dayton St, Greenwood Village,CO 80111
Please note due to the church having a movie night outdoors, they might move indoors when adverse weather is in forecast, so in case they move indoors, we will meet in the Friendship Hall which is the basement level (straight down the main hall and down one level, elevator is available for those in need).
Pre-register your mini-auction sales items at myfishauction.com.
Please note the auction website has a new look. It should be more intuitive and easier to use. Check it out!
- Become a CAS Member -
Support Colorado Aquarium Society as a paid member for only $20.
Join online or in person at a meeting. Annual memberships coincide with the calendar year, so show your support by becoming a member today!
Benefits include:
• option to participate in the bowl show
• eligible to participate in the growth contest
• eligible for equipment loaner program
• improved seller splits on auction sales
See the CAS Handbook for additional member benefits.
You may join CAS as a paid member up until the start of auction
and be eligible for the 80-20 member split. (non-member split is 50-50)
- Bowl Show -
October Bowl Show
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Anabantoids/Gouramis Includes Dwarf, Pearl, Moonlight, Kissing, Opaline, Gold, Banded, Thick-lip, Chocolate, Licorice, (Trichogaster,Colisa, Osphronemus, Macropodus, Sphaerichthys), Paradise Fish, Climbing Perch, and Bettas other than male Betta splendens.
Shown in pairs, except for female Betta splendens and fish over seven inches long which may be shown as singles. -
Catfish generally known as Plecos. Includes Royal, Tiger, Clown, Gold Nugget, Vampire, (Hypostomus, Panaque, Pekoltia, Acanthicus, Baryancistrus, Hypancistrus), all that may be known by L- or LDA- numbers.
Excludes cultivars of the genus Ancistrus.
Shown as pairs where sexes are readily determined, otherwise two fish. Fish over seven inches long may be shown as singles. -
Open Class
Bowl Show participants please arrive early to setup your tanks/bowls and fill out necessary paperwork for your entry
- Remaining 2026 Meeting Dates -
Mark your calendar to reserve these CAS 2026 event days to
fulfill your aquatic appetite:
10/17 Saturday, Fall auction
11/6 Friday, regular meeting
12/4 Friday, Holiday dinner party

ABOUT US
The Colorado Aquarium Society, established in 1947, is an open group for aquarists to share their interest in all facets of the aquarium hobby. Our members consist of advanced expert hobbyists as well as beginners and all levels between. Our monthly meetings are open to the public and everyone is welcome!



