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Found 52 results

  1. Hi need help as im confused to what has happened with my Jack and not sure what i should do. I bought a mangrove jack about 4 weeks ago now and is currently around 15cm in length. He is in a 180gallon 6x2x2 tank with a redbay snook, pbass, 4 silver dollars and a sailfin pleco. The snook and pbass are around the same size. The mangrove jack was doing really well eating and swimming around like crazy and no signs of any bullying from him or any other fish. I went away for a few days over the Easter break and just came home and noticed he was really pale in colour stomach looks a little swollen, gasping rapidly and when swimming he would just drift around nose facing upwards with tail twirling underneath. I also noticed his fins and tail have been torned up a bit, I also noticed when he got close to a few silver dollars they chewed on his top fin and he just took it twirling around, which straight away raised alrm bells. He is the biggest and thickest fish in the tank other than the pleco and couldn't belive my eyes when I seen the silver dollars chewing on his fins!! I straight away did a 40% water change and put a divider up to seperate him from the other fish. I also put some*aquarium*salt in the tank to help in case of an infection and to help with the fins.* Its been a couple hours now and at times he looks like he is doing ok (still gasping rapidly) and has some control of his swimming, but every now and then when I look back over at the tank he would be whirling around at the surface of the tank!!* All other fish are doing just fine. Cant understand why the jack is acting this way. Is there anything else I can do? I have a male dovi about 18cm in a 90 gallon. Should I swap the two around while I have the divider up and treat the 90 gallon as a quarantine tank and give the jack a salt dip before I put him in the 90 gallon tank?
  2. What is the best thing to feed my jack he's about 30cm at the moment and I've just got him on massivore pellets but want to start mixing it up a bit and not sure what the best thing to give him is?
  3. Just in red dragon an hung has bout 10 jacks for sale 8-10 cms. $250 each
  4. Anyone out there got a small jack for sale for under 100 bucks
  5. Is anyone selling or know where I could get a mangrove jack? Preferably on brissy nth side or sunny coast
  6. Just a quick clip of the next underwater video coming soon some Lutjanus argentimaculatus having a close look at the camera update - see next video with more jack footage here - http://www.qldaf.com/forums/photography-video-lounge-23/underwater-moreton-bay-120554/
  7. Hello. last week I purchased a 7 cm jack and I have noticed a fair amount of flashing/scratching on gravel/ jaw flicking type behaviour in the past few days. He also tends to spend alot of time in one of the bubbles just sitting in them. Apart from this he is eating fine. Very active no stress colours or noticed discolouration. This was a second hand tank that I removed the other fish from after buying it and re did the whole substrate and ornaments but I did keep the filter cycled so that I didn't have to start from scratch. This has been happening now for last few days. I would consider my self a very well read beginner but a beginner nontheless...I am keen to get on top of this as I would hate to risk such an awesome (and expensive ) fish. Parameters as follows Ph: 7.5-7.6 api Ammonia:0 api Nitrite:- 0 (API drops Nitrate:- 10-20 ppm (API drops)/> Gh:- unknown Size of tank:- 6x2x2 Temperature °C:- currently at 28 max Been running for: 1 month Filtration:-Canister/Sump/Internal Filter/Sponge:- aqua one 2400 aquis Heavily aerated Feeding:- What food and How often: peeled prawns pieces twice daily No live food at this stage Recent Medication Treatments: none Last water change:- 3 days. Added around 5ppm salt dose in two stages both times he went crazy active swimming around like a mad fish... i am getting to the stage where I think treatment is necessary...the fish is not flashing constantly but it would be at least a few times an hour. Any advice or expertise would be greatly welcomed...
  8. I have a baby mangrove jack about 10cm healthy fish want to swap for marine fish/moray eels let me no what you have... Live on the sunny coast
  9. .Does anyone know where I can get a mangrove jack
  10. Hi so glad to be on here. my mangrove jack is in brackish water he is rubbing on the rocks all the time. We can't see anything on him we have changed his water and have also treated him with white spot medicine as the fish shop told us to. He eats fine is happily swimming around but does a flick against the rock all the time. What else can it be or could it be a habbit?
  11. Hey everyone, Trying to figure out a suitable species to go in my 5 foot tank. I want a native that's aggresive and grows large. Will only be keeping the one fish in the tank. The sooty grunter I've heard is quite aggressive and I don't mind their look. Not expensive either. A mangrove jack is another obvious choice. Has anyone information/expirence keeping on these species? Which would you rather? Cheers
  12. Is anyone able to help with what is a good ppm gh for a jack I know they like high gh but I'm on rain water so I have low gh and also what kh is best thanks
  13. Problem:-mangrove jack isn't very active not eating and is only moving 1 gill Ph:-7.8 Ammonia:-0 Nitrate:-0 Nitrite:-o Gh:- Kh:-not sure salt is at 2500ppm Size of tank:-6-2-2.5 is. And a system with 8 foot as we'll Temperature °C:-26 Been running for:-2.5 years Filtration:-Canister/Sump/Internal Filter/Sponge:- huge sump Fish in tank:-Africans and jack in his own tank Plants in Tank:-nill Feeding:- massivour sticks but hasn't feed in 3 weeks Recent Medication Treatments:-protozoan Last water change:-today Water change every 2 weeks but has been daily with treatment
  14. Hey guys, just after some advice I just got a 35-40cm mangrove jack (apparantly two years old but I doubt it considering his teeth only just coming through), and I wanna know how much salt he needs, (previous owner said around 5 handfulls POOL salt to 200L), whethed pool salt is ok or not ? Lol and stuff like a good diet, what media for the filter, and any general advice...
  15. Hey every one! My little mangrove jack is playing up I think he might have white spot or ich (are they the same?). I have run in too it with clown loaches and ghost knife fish and cured it so I have an Idear about it.. He's trying to scratch himself on the gravel hasn't got spots on him tho I would prefer not to use treatments don't want to reck my filters ect. I've got him in 20gm to 40L of salt I know salt helps with white spot?. Please help..
  16. Thought I'd put up some pics of my jack and his tank mates he's about 30cm and has been sharing his tank with two salmon tail catfish for one week now with no carnage
  17. Hey guys I'm looking to buy one of these awesome fish so I'm keen to see every ones fish , show us what you have
  18. Hi all I got a 25cm jack on the weekend and wanted some info from you people that have had them before on how often you are meant to feed them like is it best to feed them morning and night or just once a day thanks
  19. Found a nice little area with a 4-5cm tiny jack. Don't ask me where cause I'm not gonna tell you haha. Just wondering how people get their hands on the small ones that you can't hook. Any Traps? Nets? I dunno. Help would be greatly appreciated as I've always wanted a Jack to grow up Cheers P.s. I'm not 100% sure if this is the right place to put this question so please don't be mean if it isn't haha
  20. I'm looking to upgrade my tank and would like to know if anyone has successfully kept tank mates with their jack. My jack is currently 20cm andd I'd like to get a motoro or 2. I'm trying to decide on a 3foot wide tank or going for a 2 foot wide tank. This is the second jack I have owned and i know they are territorial and aggressive. Any experiences or info would be great.
  21. Hey there just a quick question, I have a 6x2x2 tank with a 12-15cm mangrove jack, going to be getting 2 Motoro pups very soon, do you think there will be any problems with this? The jack is new but will be forfeited for the rays if its not okay. Thanks!
  22. Hey all, I was just looking for some info on Mangrove Jacks in aquariums. What water ph do they prefer? Also water temp? Just general information. Cheers.
  23. Dropped into atlas aquarium today and saw that they had about 7 nice mangrove jack that were all about 5cm. Just thought I'd pass on the info as there aren't too many youngens about
  24. Took these this arvy. It has only been in there for the last 24hrs but has colored up pretty well so far. I can't wait to get some more shots once it is fully settled. Measured it @ 19" TL so it has a little size to it already. I am so glad I picked it up as it stands out so well in my black tank and is a lot more active.:-) ps..Thanks Luke;)
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