{"id":2618,"date":"2024-08-15T19:01:07","date_gmt":"2024-08-15T19:01:07","guid":{"rendered":"https:\/\/bogott.net\/unspecified\/?page_id=2618"},"modified":"2024-08-15T19:01:07","modified_gmt":"2024-08-15T19:01:07","slug":"paracheirodon-axelrodi","status":"publish","type":"page","link":"https:\/\/bogott.net\/unspecified\/?page_id=2618","title":{"rendered":"Paracheirodon axelrodi"},"content":{"rendered":"\n

“Cardinal Tetra”<\/p>\n\n\n\n

Essentially all the tetras I’ve kept like to spawn in the morning at first lite. Cardinals are the exception: they spawned only in pitch black, in the middle of the night. This simplified things a bit because I could put a pair in a spawning tank, cover it with a box, and then just forget about it for a few days; no need to gradually adjust the lighting as a spawning trigger.<\/p>\n\n\n\n

In my notes about neon tetras<\/a> I said that I wasn’t sure if the eggs were light-sensitive but I kept them in the dark just to be careful. Cardinal tetras I can say are for sure light-sensitive because if I uncovered the box too soon (even after the eggs had hatched but before the fry were eating) a lot of them eggs or fry would drop dead.<\/p>\n\n\n\n

With the combination of very-low tds water + total darkness i was able to raise a number of these, although I never got consistent enough results that I could have produced them in bulk.<\/p>\n\n\n\n

A couple of years later I discovered that a tetra community tank that contained some of the first batch of cardinals was producing cardinal fry without intervention. So it’s possible to get fry from this species with a hands-off approach, although I think that tank may have been charmed in some way. This was when I was running my waterchange system with pure RO water so the combination of lots of moss + soft water + (extreme luck) did the trick.<\/p>\n\n\n\n

I don’t have any photos of those early spawns, but I do have photos of the charmed tank, which in addition to cardinal fry also turned up Hyphessobrycon vilmae<\/em> and Hyphessobrycon roseus<\/em> fry:<\/p>\n\n\n\n

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“Cardinal Tetra” Essentially all the tetras I’ve kept like to spawn in the morning at first lite. Cardinals are the exception: they spawned only in pitch black, in the middle of the night. This simplified things a bit because I … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2480,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2618","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/bogott.net\/unspecified\/index.php?rest_route=\/wp\/v2\/pages\/2618","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bogott.net\/unspecified\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/bogott.net\/unspecified\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/bogott.net\/unspecified\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bogott.net\/unspecified\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2618"}],"version-history":[{"count":1,"href":"https:\/\/bogott.net\/unspecified\/index.php?rest_route=\/wp\/v2\/pages\/2618\/revisions"}],"predecessor-version":[{"id":2619,"href":"https:\/\/bogott.net\/unspecified\/index.php?rest_route=\/wp\/v2\/pages\/2618\/revisions\/2619"}],"up":[{"embeddable":true,"href":"https:\/\/bogott.net\/unspecified\/index.php?rest_route=\/wp\/v2\/pages\/2480"}],"wp:attachment":[{"href":"https:\/\/bogott.net\/unspecified\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}