koi

If you speak with a dedicated KOI hobbyist then you will be advised that a minimum of 1500 gallons is needed to keep a limited stock of koi would be 'ok'. (Limited meaning 4 to 5 Koi) You can keep a limited number of koi in less water but it requires dedication to keeping up the water quality and a very good filtration system. Koi are known as a 'large' fish - not all get big but the majority do, it's in their genetics. They are a fish that continue to grow throughout their lives, the rate of growth depends on many factors.

The type of koi stock you choose to keep - ex. pond grade to show fish - in other words, your 'goal' - is a large factor as to pond volume to aim for. Pond grade are just that, throw-aways fromt he breeders, small koi (2 to 8 inches) - they don't meet the criteria or effort to be kept - these end up in the Pet stores or garden centres and are typically 'cheap'. These are what are most often found in backyard ponds of new hobbyists. With these 'cheap' koi there comes many possible health issues - dependant on how they were housed at the retail outlet.

bettagurl, fancy type goldfish will not fair well with koi - this goes to feeding really, koi are very agressive when it comes to food and fancy gf just can compete. Standards such as comets or shubunkins are better suited to be kept with koi.
My suggestion - If you wish to have fancy goldfish, like the ones you mentioned above, and forget the koi - keep the idea of a 700 gallon pond and choose the fancies you like. Keep in mind that fancy gf are not as hardy when it comes to temperature changes as standard gf, so care will need to be taken for preparing them for your Virgina winter season if you keep them outdoors.
 
. . .If you speak with a dedicated KOI hobbyist then you will be advised that a minimum of 1500 gallons is needed to keep a limited stock of koi would be 'ok'. (Limited meaning 4 to 5 Koi) You can keep a limited number of koi in less water but it requires dedication to keeping up the water quality and a very good filtration system. Koi are known as a 'large' fish - not all get big but the majority do, it's in their genetics. They are a fish that continue to grow throughout their lives, the rate of growth depends on many factors. . . .

Great post!

Roan
 
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