My albino cories bred....does ph affect growth?

600 Views 5 Replies 3 Participants Last post by Nordic, Jan 27, 2017

The Big Buddha

Discussion Starter · Jan 26, 2017

I've had 2 albino cories in my 40b for about 5 years. Haven't changed a thing, hadn't done a water change in a month. So did nothing really to have changed any parameters. They spawned about 2 weeks ago, I moved most of the eggs into a breeder net in the 40b, and cut off a couple of anubias leaves with eggs and moved them to my small low ph tank (5.6-5.8) that has aquasoil. Feeding them freeze dried brine shrimp crushed real fine and sinking pellets. The ones in low ph tank are twice the size of the ones in the 40 gallon (ph 7.5).

Any thoughts as to why? Any factors that may stunt or accelerate growth?

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Nordic

· #2 · Jan 26, 2017

Nitrate, nitrate and nitrate is what you want to really avoid with growing fry.
Regular water changes will grow fish faster than extra feeding. Larger tanks can sink more pollutants before it becomes a problem.

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KayakJimW

· #3 · Jan 26, 2017

Not sure if this applies to what's going on here, but gender can be swayed depending on water chemistry. Check out this article.

Like Nordic said, minimal nitrate is key to growing healthy fry. It would be interesting to test the two tanks and compare that as well. If they are the same, maybe there's a better food source in the smaller tank? It's interesting that the smaller tank is growing them faster.

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Nordic

· #4 · Jan 27, 2017

I find with fry, you don't want a tank that is big enough for food to go undetected. At the same time, they do respond to having more space available.
Once fry can swim well, you might as well move them to a bigger space if you have it. Although they may initially grow faster in a small tank, they will make up for it real fast in a large one.

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The Big Buddha

Discussion Starter · #5 · Jan 27, 2017

Great, thanks for the advice, i probably had about 40 fry in the 40b and about 15 in the other tank. The 40b has a high bio load, so I moved 20/40 to the other smaller tank with lower nitrates, gave them a drip for the ph difference. Did a 25% WC on the 40b that was well overdue.
Ironically it's the tanks I neglect that tend to breed. Had ottos breed in my neglected 10g that was left 4 months without any WC or maintenance. Came back to a tank with more Ottos than when I left. Had 4 new smaller ottos in the tank.

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Nordic

· #6 · Jan 27, 2017

Breeding sometimes happens as a response to unfavourable conditions.
Even plants and fungi do it.

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