CPDs and Microdevarios in planted Fluval Edge - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 15 Old 03-25-2013, 05:33 PM Thread Starter
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I gather than more numbers are important for Sundadanio axelrodi; 20 being minimum.

I don't know your level of knowledge, so my comments may be well known. Shoaling fish that are maintained in small numbers will become more aggressive because of this. Many factors affect this obviously, but the nippiness which is probably natural for the species is almost certainly to be increased with so few of them. I think both of these species should have more in their group.

Byron.
Thanks Byron,

I have to admit, I stupidly went on the advice of the aquarium I was buying from, who said that the 'dwarf green rasboras' (which is what they were calling the Sundadanio Axelrodi) did well as long as there were at least 5 of them. I will buy a few more and see if that settles them down - I guess I just have to try to make it work at this stage.

The CPDs seem like they're doing well - they eat well, they're out of the vegetation most of the time and their colour is improving every day. I think I'll just leave them in a group of 5 and keep an eye on things.

The most troubling thing is that my shrimp keep dying. I've lost 4 so far, after the cycling of the tank was complete. Water parameters have been completely stable during this time (Ammonia: 0, Nitrites: 0, Nitrates never going above about 5ppm and PH about 6.5) and I have no idea what is wrong. I have one little washed-out male left. Any advice?

Cheers,

Steve
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post #12 of 15 Old 03-25-2013, 05:38 PM
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Thanks Byron,

I have to admit, I stupidly went on the advice of the aquarium I was buying from, who said that the 'dwarf green rasboras' (which is what they were calling the Sundadanio Axelrodi) did well as long as there were at least 5 of them. I will buy a few more and see if that settles them down - I guess I just have to try to make it work at this stage.

The CPDs seem like they're doing well - they eat well, they're out of the vegetation most of the time and their colour is improving every day. I think I'll just leave them in a group of 5 and keep an eye on things.

The most troubling thing is that my shrimp keep dying. I've lost 4 so far, after the cycling of the tank was complete. Water parameters have been completely stable during this time (Ammonia: 0, Nitrites: 0, Nitrates never going above about 5ppm and PH about 6.5) and I have no idea what is wrong. I have one little washed-out male left. Any advice?

Cheers,

Steve
What is the GH? Shrimp generally do not fare well in soft water, and a pH of 6.5 would suggest a low GH.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #13 of 15 Old 03-25-2013, 06:17 PM Thread Starter
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What is the GH? Shrimp generally do not fare well in soft water, and a pH of 6.5 would suggest a low GH.
I don't have the GH/KH test kit at the moment (just the pH/Ammonia/Nitrite/Nitrate API freshwater master test kit). HOWEVER, I know that Melbourne's water is famously soft and maybe that's the problem? Is that likely to kill off shrimp in a week?

One thing that I just read on planetinverts.com is that Anubias and Crypt plants 'leak a toxic substance into the tank'. My feature plant is a big Anubias on a piece of driftwood, surrounded by planted Crypt so maybe I've found my answer?

S
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post #14 of 15 Old 03-25-2013, 06:57 PM
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Originally Posted by plantedfluvaledge View Post
I don't have the GH/KH test kit at the moment (just the pH/Ammonia/Nitrite/Nitrate API freshwater master test kit). HOWEVER, I know that Melbourne's water is famously soft and maybe that's the problem? Is that likely to kill off shrimp in a week?

One thing that I just read on planetinverts.com is that Anubias and Crypt plants 'leak a toxic substance into the tank'. My feature plant is a big Anubias on a piece of driftwood, surrounded by planted Crypt so maybe I've found my answer?

S
I've not heard of the plants being toxic to shrimp before, but that doesn't mean it may not be part of the issue.

But I can say with fair certainty that shrimp do not last in soft water. There is no calcium for their exoskeleton. Snails would have similar problems, except for the Malaysian Livebearing snail which is the only one I know of that manages fine in soft or hard water.

As the fish need the softness, I would accept that and forget shrimp.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #15 of 15 Old 03-25-2013, 08:07 PM
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...

As the fish need the softness, I would accept that and forget shrimp.
Yah, that might be a wise idea.

Jeff.


Total years fish keeping experience: 7 months, can't start counting in years for a while yet.

The shotgun approach to a planted tank with an LED fixture

Small scale nitrogen cycle with a jar, water and fish food; no substrate, filter etc
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