using freshwater filter for salt water - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 5 Old 07-21-2010, 10:03 PM Thread Starter
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using freshwater filter for salt water

(I just joined this website today so hopefully this is in the right place)

I have a 90 gallon freshwater tank and recently i've decided to try to convert it to salt water. I just spent quite a bit of money on a new canister filter (fluval 405) about a year ago and was wondering if i could use the same filter if i converted my tank to salt.

If i could, would i have to replace the media and let it run in salt water for a while before putting anything into the tank?

I have also been doing some research and in most articles i have read there has always been talk about protein skimmers. Would i need a protein skimmer my fluval 405?

Also, would i need to use an air pump if i'm using my fluval 405 with live rock?

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post #2 of 5 Old 07-21-2010, 10:15 PM
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freshwater filters dont work the same in a saltwater tank. heres an article that sums things up
if theres questions after, please feel free to ask.

a QUALITY skimmer should be used on a saltwater tank. read online reviews about different brands as some are garbage and others golden. you want to save up extra cash for an extra nice skimmer the first time, its worth it.
a bubbler in a saltwater tank will just promote salt creep. the way a bubbler works in freshwater is it disrupts the surface tension of the water allowing for better gas exchange, it doesnt really "add" air to the water but rather allow the water to exchage the air. for this is a saltwater tank we use powerheads, the skimmer, and a drain to the sump with a return pump for good aeration of the water.
and while your at it why not this one too

i still suggest much more reading before diving head first into saltwater. ask lots more questions too. it may also be wise to search your area for a local reefing club.
welcome to the forum!
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post #3 of 5 Old 07-22-2010, 08:16 AM Thread Starter
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thanks :) those different articles really help and they have answered many more of my questions
how would i find a local reef club? what is a reef club?
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post #4 of 5 Old 07-22-2010, 08:38 AM
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you can go to and type something like " local reefing club in ( insert the area you live here )"
which i would try with the qoutes removed.

all reefing clubs are different but at the same time similiar in that members keep saltwater tanks. if your in the states, and preferably along the coastline it should be pretty easy to find one close by. they usually include a monthly meeting, coral trades, meeting new people with the same interest, learning things, maybe a chance to pick up some cheaper used equipment, seeing others tanks so you know how theyre setup and how to do it for yourself and so on, again these vary between clubs but its along those lines. check it out for yourself!!
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post #5 of 5 Old 07-22-2010, 12:41 PM Thread Starter
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thanks for all the help i really appreciate it :)
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