15,000 US Gallon Pond Ready to Stock - Help!!!

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Fin Rot or Pacu Bites?

Have a look at the attached images. I think that the Pacu are getting a bit nippy, they are the only fish with teeth and are around 4Ks now, any advice.

The fish is a Rohu (Labeo rohita), 6 months, 20" and 3 Kgs, unfortunately it jumped out this morning. First casualty.

I have stocked with Rohu, Siamese Giant Barb, Koi, Featherbacks, Chao Phraya giant catfish, peacock bass and RTC, they seem to be getting along reasonably. The predatory fish where stocked later and are much smaller except the Pacu, i think i should take them out.

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When I had pacu they did the same to some of my koi. They also put a few chips in the plaster as they tried to scrape algae off the sides. I think losing the pacu is a good idea.
 
Yanbbrox,

Sorry did not realise that a lot of people had been kind enough to reply with helpful advice.

Here are some more pictures of the filtration system. It basically consists of 6 chambers of a cubic metre each, with an up/over flow between each one. Each chamber is shown in order. Its kind of illegal but mainly coral (and some Oyster shells) are used for particle filtration. Pond has a surface skimmer and a 4" bottom pipe from the centre of the pond which both fee to the first chamber. All chambers have a pipe that runs underneath to the end chamber. Chambers 1, 4 and 6 have no coral, with a blocking pipe in 4 and 6. To clean the chambers, the main pond is blocked off (Skimmer and bottom pipe) and the blocking pipes pulled out from chambers 4 and 6 and the fish waste runs through to the last chamber (6) with the return flows to the pond blocked. Then a quick turn of a switch and the waste is diverted to a drain pipe.

I have 2 pumps, 1 700W which feeds through a 72W UV and out through the 2 outlets as shown in the last 2 photos and an auxilally pump of 300W that feeds to 3 separate outlets as a backup. I put in another 30W of UV in case the UV lights fail on the main pump. Seems to keep things clean enough.

Hope this helps.

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A school of Temensis! And then a few big catfishes. Next, add 3-4 (1mx1m) rock pile reefs and put in some african or any other smaller cichlids that will produce sustainable feeders!
 
Yeah if I had a pond like that I'd do all cichla....with a bunch of smaller ca/sa cichlids in there first to let them start breeding and the bass can feed on them


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