Black aro fins??

  • We are currently upgrading MFK. thanks! -neo
Get it figured out? That does look like fin rot but doesnt make sense for your other fish not being effected.

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Haven't done anything other than feeding and water changing, we had a few days of steady rain last week so while our water tank (for the house) was full I did a couple of [relatively] big changes. It does look like it is slowly and sporadically filling out between the rays, certainly isn't getting worse.
 
You use rain water for the water changes?

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if it was finrot the rayfin will also gone too ... it doesnt seem to be sick
just maintain good water quality since it was raining ... ;)
 
Hey David R, nice arowana!
sorry I can't offer any advice regarding the fins on your fish...but seeing you are also from NZ, I have some questions for you!

Where in NZ did you get your arowana from? At approximately what price if you don't mind?

I'm willing to pay up to around $500 NZD for a black arowana or $2500 NZD for an asian RTG, the problem is none of the stores I've asked around in Auckland stock black/asian arowanas.

Please give me some direction
 
Bit of an update, the gaps between the extended rays still seem to be slowly and randomly filling out, water is still good (nitrates still <20ppm after a two week holiday with no WC), I'll try take some pics tonight or tomorrow.

You use rain water for the water changes?

Yes, we live out of town and our entire house runs off rain water collected on the roof and stored in a large plastic tank.
 
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