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. If you are interested in learning about the hobby, sharing your experience in the hobby, or would like to discuss any aspect of fish, invertebrates, plants, aquariums, ponds, and amphibians, The Colorado Aquarium Society General Meetings take place the first Friday of each month except July and December when we have parties instead.  Our meetings are open to the public and everyone is welcome!  We have a public auction twice a year in the Spring and Fall, mini-auctions at each meeting, and special events though out the year. Please see below for current dates. Each meeting has a Bowl Show where members show their fish and/or invertebrates for prizes and ribbons. Other programs we have are Grow Competitions (both fish and plants), Aquarist of the Year, and more. Members who place in these competitions are awarded points that are accumulated towards a number of different awards.  For details on these programs and all our activities, rules, and guidelines use the menu above.

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COVID-19 Corona Virus cautions and closings are preventing us from meeting.  When this changes we will post it here, on Facebook, and by email.  So, our Meetings are canceled till further notice.

Monthly Meeting: CANCELLED  Bethany Lutheran Church, 4500 E. Hampden Ave. Cherry Hills Village, CO 80113.

(Front room as usual)

Speaker:  TBA

Bowl Show:  TBA

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Mini-Auction:  (See Auctions tab for more details). 

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Coming Events, Mark your calendars:​​

Meetings Canceled till further notice. 

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The logos you see here are now on T-shirts and merch.  When the T-shirt or Hoodie is worn into a participating LFS (local fish store) between now and the end of 2020 the wearer gets a 5-10% discount (at the discretion of the retailer).  A list of participating stores is on the sponsors page.  

To buy your CAS gear click here

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Meetings take place at Bethany Lutheran Church 4500 E. Hampden Ave. Cherry Hills Village, CO 80113.   

Membership is free, so your support is greatly appreciated. 

Find us on Instagram - @colorado.aquarium.society

Colorado Aquarium Related Clubs​

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•  Rocky Mountain Cichlid Association meets at Colorado Academy, 3800 S. Pierce St.  Meeting dates are generally scheduled for 2nd Friday of each month, except July, August, and December.  For more information go to rmcichlid.org.

• Colorado Killie Club  Meeting dates are generally scheduled for third Sunday of odd numbered months.

• Marine Aquarium Society of Colorado (MASC) meets each month at various locations in the metro Denver area. MASC holds coral swaps around the metro area. Visit their FaceBook page for more info. Membership is $24/year.

• The Southern Marine Aquarium Society of Colorado (SCMAS) meets monthly in the Colorado Springs area. Membership is $20/year.

• Rocky Mountain Koi Club   Meets the 3rd Saturday of the month usually.  See their website for details.  

• Southern Colorado Koi Club Meetings are held once a month,  February through November.
  They will be held at various places and times, so check the events calendar for future dates.

• Colorado Water Garden Society   Meets at the DBG, usually Mid-month, see their website for more info.  They are pond plant focused, however we listed them because of the overlap with aquarium plants and they have spoken at our meetings in the past.