Cleaning Marine Tank To Go Back To Coldwater

Midnight Tboy

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hi there,

just stumbled across this site on my quest for answers :)

OK so I'm not exactly new to the fish hobby as such, but I'm new to this forum and coldwater :)

I've had my marine reef system for a few yrs now, but I've just broke it down and got rid of the fish due to lack of time. I have a smaller tank out back which currently has a few coldwater fish, so I was thinking I'll clean out this marine tank (just a regular Rio 125 - tho with a T5 Luminaire), and then move the cold water fish to the front room in the larger tank.

I've read and searched plenty times with advice saying when going from tropical/coldwater to marine to make sure no chemical treatments have been used, but basically I'm wondering what the best and safest way to clean this tank out would be, as obviously there will be salt residue in the tank, and naturally I dont want to use anything that might harm the fish. I'm sure I'd read somewhere ages back that white vinegar or baking soda or something like that would do good but thought I should best check. In the past I made the mistake of using a fish net in both the marine and coldwater tanks, even tho it was thoroughly cleaned, but still my golden apple snails must have been uber sensitive and died straight away, so I'd rather be more careful now and try to get rid of all the salt if possible. There's no snails in there at the moment anymore, just a few goldies and shebumpkins (spelling), but I'll be adding to it later.

Lastly, one quick question. I'd heard by word of mouth that supposedly, if I did decide to go tropical, ie put a heater in (got a filter already), then goldfish would still thrive in there too, and allegedy grow much larger than normal. Is that true do you know :)

regards,
Tuck
 
to clean it use non iodized salt and scrub it out good. you will have to do a whole new cycle though. so you will need new media. new substrate, and maby new lights if they are too bright.

goldfish are tropical and will not thrive in tropical. tropical and coldwater should not be mixed together.
 
When I converted one of my Marine tanks back to freshwater I just emptied it filled it from the hose then pumped out the water and repeated it about 5 times
 

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