i was thinking of converting my already cycled tank with fish in it to a brackish set up for adult mudskippers alongside finger fish, monos, mollies ect. but is it as simple as removing my fish getting the salt level right then adding new fish. i mean will my cycled filter lose any bacteria by adding salt? do i need a protien skimmer? ect ect? is there any does and donts please x
There is absolutly no controversy when it comes to salt and brackish water, Grayshark has had it explained to him/her a few times but it appears that he/she won't accept the advice given here.
Use marine salt, when converting to brackish just increase the salinity by no more than SG1.002 per week, you could probably do it twice weekly but once weekly would be less stressful on the nirification bacteria that keeps your tank cycled. If you increase the salinity by too much you will kill off your nitrification bacteria and you will have an uncyled tank!
If you have a cycled tank then you don't need to remove the fauna to convert to brackish. You only need to make sure that they are Brackish fish and that the fish that you decide to keep have the same salinity requirements, i.e Fiure 8's require low salinity SG1.002-SG1.005, Monos and Scats = SG1.005 up to marine conditions. Temperments and sizes all vary greatly.
I vary my mudskipper tank regularly between SG1.008 and SG1.015. They are mostly terrestrial and therefore need a large land area, I have a sand substrate that slopes out of the water into quite a large land area with a couple of large pieces of wood that jut out of the water for them to rest on also. The water is deep enough for an internal power filter, approximately 10cm deep, you do not need any more than this. Any deeper will make it harder to slope the sand out of the tank and if you only provide a floating platform in a deep tank it will make it harder for them to get out of the water.
Mudskippers do not share aquariums well, they will eat anything small enough to fit in their mouths (which are big) and they are reportedly nervous of entering the water if they see larger fish swimming about plus the lower water level will mean less water volume and a more polluted tank - because of their nature mudskippers are fairly robust and can tolerate levels of ammonia that would kill other fish! I have 2 P. barbarus mudskippers, which are apparently the more aggressive species, and they are seperated because the larger will kill the other given the chance. It is a good looking mudkipper - buy one, dedicate a no less than 1m long tank to it and you will be rewarded with its personality.
Protein skimmers are for marine tanks - you do not need one with a brackish tank and it will most likely not work, some apparently work down to SG1.015 but some don't.