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Converting marine to fresh water?

A

anne-marie

Guest
I currently have a marine aquarium which doesn't have any animals in it. I need to change it to a freshwater tank because my axolotl collection is growing! Can i use the same filter media (carbon internal filter)? The substrate is coral sand but I don't think I can use this in a freshwater tank. Can anyone help me with this?
 
P

peter

Guest
hi Anne-Marie.

not entirely sure but from what i have just read on the web, i would guess that the filter media already present would be suitable. the established bacteria would probably be the same as those in freshwater filters.
my concern would be the coral sand. do you mean it's 'crushed coral'?
crushed coral can be used to elevate pH levels and maintain the pH at that higher level. crushed coral contains calcium carbonate (which raises the pH).
might be worth checking out the pH level as it is without beasts in it.

peter
 
B

brian

Guest
Yes, you can easily convert your saltwater tank to fresh. Here's how:

Filter - no change here. You will have to do frequent water changes for the first week to flush the system though. With no animals in the tank, change all the water to fresh, and do a half water change every day for a week. This will flush the salt and decay from the system.

Substrate - this will need to be completely changed, as coral sand would not be good for axies. However, it can be used with some kinds of fish, most notably african cichlids.

Tank and Decorations - these just need a thorough rinse with warm water to get rid of any salt residue. Same goes for any other gear you might be using (filter intakes, spray bars, etc.)

Certain other gear from your saltwater tank will not be used at all. Skimmers, heaters, refugiums, calcium reactors, UV sterilizers, etc. are completely unnecessary. You may need a chiller depending on your local temperature. I see you are in Australia, and a lot of people there are having problems keeping the temp down in the summer.
 
A

anne-marie

Guest
Okay, cool. I didn't think the coral substrate would be suitable, but I'm glad I don't need to buy a new filter. Thanks guys!

Brian, we are heading into winter here now so heat shouldn't be a problem and as for summer I have no idea how people survive over here without air-conditioning. My 7 year old axolotls have weathered the temps so I guess Gleek and the Wonder Twins will too, eventually.
 
B

brian

Guest
Glad you're not having temp problems. Just remember to do water quality tests before you add your animals, just to make sure that everything is ok. You'd be amazed at how many marine animals are living in your filter that will die off and foul the water when you switch it to fresh.
 
A

anne-marie

Guest
Ok, I've changed the water and substrate. Is there any particular part of the water quality I should be testing for or do I need to do the whole gamut of pH, ammonia, nitrates?
 
General chit-chat
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  • Asholotl:
    Daww.
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  • Asholotl:
    i try to feed mine via hands. or a turkey baster if its too slippery for me to hold onto. but make sure there is plenty of space for the axolotls to thrash on, or drop it next to their head.
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  • The-Axolotl:
    Yes we feed them with tweezers but only hold onto the food a little to they don't Hurt themselves on the tweezers, they will only eat it if we move it around in front of their head :p
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  • The-Axolotl:
    There waters is a little bit Hot right now I'm gonna put the cooler on
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  • Asholotl:
    looks like the water is fine till tomorrow. which is nice. im super tired of late. ive been doing large water changes for a week before getting their 'tubs' i just wish i had the old filter ;3;
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  • Asholotl:
    you got a cooler :D Thats so cool! i normally chill their water down if it gets too warm with clean dechlorinated water when they were in their bigger tanks. i'll need to get one that can work with two tanks at some point. or find them for cheap and get two quiet ones. since im in an apartment.
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  • The-Axolotl:
    Yea most coolers are super expensive though the price range is around $100-$500
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  • Asholotl:
    yeah D:
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  • Asholotl:
    i need one before summer though so i should prob save up
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  • Asholotl:
    or its waterchanges and/or air fans for me.
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  • The-Axolotl:
    Here its Hot like every day so we have to have the cooler :p
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  • The-Axolotl:
    But we also have a fan
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  • Asholotl:
    its just wet in oregon and cold most of the time.
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  • The-Axolotl:
    So good axolotl weather :p
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  • Asholotl:
    yeah, most of the time lol. its always cold in my room now cause of them.
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  • The-Axolotl:
    Yea my room is freezing because of the axolotls xd
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  • The-Axolotl:
    The worst thing is my cat always jumps up next to the tank but good thing it has a lid 😁
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  • Asholotl:
    same D: my cat is constantly knocking over my bottles and stuff for my axolotls.
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  • The-Axolotl:
    One time he almost knocked over a whole bottle of tap water conditioner we just bought
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  • Asholotl:
    haha. sounds like a cat
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  • The-Axolotl:
    I know right what is it with cats constantly knocking every thing over??
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  • Asholotl:
    And boxes. you can even tape a square on the floor and ive seen them go in it xD
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  • The-Axolotl:
    Haha 😂
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  • Asholotl:
    im going to head off now, its 12 am now so i got to rest. :D nice talking with ya!
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  • Unlike
    The-Axolotl: Bye 😀 +1
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