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Colorado Aquarium Society

Upcoming Events

No events at the moment


We are pleased to have found a new home
for our monthly meetings.

Please note the new meeting location.


June Meeting is today, June 7th @ 7 pm

- Meeting Presentation -

Alex Leong will give a presentation on planted tanks and how to properly use CO2 in planted tanks without putting animals to permanent sleep.


Where: Hope United Methodist Church, Fellowship Hall

             5101 S. Dayton St, Greenwood Village, CO 80111

- July Social -

This year our July event is a social gathering, see the events section for more details.

- Thanks to Our Supporters -

Big thanks to MC Aquatics, Neptune's Tropical, Fish Den, Aqua Rocks Colorado, Biggs Lagoon, Sera USA, in donating to the club this past year in support of raffle prizes and items in our fund raising auctions.  Please visit your local fish stores for
your fishy needs... especially those who support the club.

- Mini Auction -

    As usual, the second half of the meeting will feature a mini-auction.

    Sellers are limited to 5 items of anything related to the hobby.

    Sellers will split auction proceeds 50-50 with the Club. Club members

    enjoy an 80-20 split.

Register your lots in advance here.

- New Membership Year -

Join and support Colorado Aquarium Society as a paid member

here or in person at the meeting.

     Benefits include:

•  option to participate in the bowl show

•  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.

Don't forget to:

1.  enter your auction items here

        2.  enter the bowl show!

- Bowl Show -

(CAS members only)

May Categories:


  1. Killifish. All Killifish (including natives)
    Shown in pairs.

  2. Bristle nose plecos.  Generally these will be cultivars of Ancistrus spp.

  3. Open Class

Bowl Show participants, please arrive early to setup your tanks/bowls and fill out necessary paperwork for your entry.



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!


Visit US

Visit us in person, usually 1st Friday of the Month, 7PM

Hope United Methodist Church
5101 South Dayton Street
Greenwood Village, CO 80111

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Contact US

We'll be in touch soon. Thanks!

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