UPDATE .This is an incredible video it shows no sign of the fighting we are told blackfish meddle in, there fighting probably comes when defending a territory as they age ,
what a video to study there behaviour from, I will video there progress and post it here.
Because most fish farms /breeding facilities are a circuit(water goes around in a circuit) you must test the water. there are tests you should do regular and those not so much, ammonia is the one you must do, to much in the water and you will have dead fish, as you can see above my ammonia level is getting high not dangerous yet but it has the potential to be. the test kit in the right upper corner are available in all pet shops .If your ammonia gets to high stop feeding the fish and add clean water.
I have had hundreds of people visit the fish breeding facility some are locals some are fishing club members some are students who are studying the blackfish, we have had doctors vets and assorted professionals all showing a interest in these great fish .From left to right Craig, young Henry, John , Chris, and I am on the end. Craig is studying blackfish at the university of Tasmania hoping to get his PHD he and his family visited the fish breeding facility to learn as much about the fish as he can I hope he geos on and finishes his studies and throws more light on the problems facing these fish. Chris is the one with fluoro jacket on he has been invaluable to the success of the facility he brings much expertise to the table with his knowledge of native flora and fauna as well as determination to help these fish.
These black crickets are in season at the moment they are here in there tens of thousands and can be found readily under almost anything they will also come to lights at night . I spend about half an hour each day collecting them, the fish love them and readily take them off the top of the water. If you are going black fishing these are a great bait put them on a small hook under a float and fish near instream logs and debris.
These ponds are based on the first pond we dug which has been so productive it would be foolish to move to another design, notice the gum tree branches, the trunks will provide habitat for a long time the rock groynes( in the fore ground) will be able to shelter small fish and the leaves will impart eucalyptus into the water and a small amount of tannin all this will lead to more fish and healthier fish in the long run.
I have control over the water via the red handled tap also in the fore ground. You can also see clumps of grass this is couch grass it will spread all over the bank and stop erosion of the top soil.