How often should I do water Changes? - Tropical Fish Keeping - Aquarium fish care and resources
LinkBack Thread Tools
post #1 of 7 Old 06-10-2007, 10:36 PM Thread Starter
How often should I do water Changes?

I have a 55 gallon freshwater tank and i use cycle and water conditioner. I hav only had the tank for 2 weeks and have had fish in the tank for only 3 days when should i vacuum?
Neffiethenewguy15 is offline  
Sponsored Links
post #2 of 7 Old 06-11-2007, 02:07 AM
You should vac during every water change. Just as common practice try to do 15-25% a week.
Daz is offline  
post #3 of 7 Old 06-11-2007, 07:49 AM
squiggles1's Avatar
what we do is change about 25%-50% in our tanks (some of ours need the big change due to plants fertilization etc) and one week we vacuum the next we rinse out the sponges in the filter, nest week we vacuum, nest week we rinse out the carbon. that way there's never any ammonia spike due to the cycle trying to catch up. we dont use cycle anymore on a regular basis since this schedule seems to work good for us. But it depends on the fish you have in there, with our discus vacuuming everytime is a necessity.
squiggles1 is offline  
post #4 of 7 Old 06-11-2007, 08:03 AM
leifthebunny's Avatar
Another factor is type of fish. In most of my tanks, I do only a 50% substrate vacuum each week as the fish don't produce a lot of waste, but in my South American Cichlid tank, I generally have to get in as much substrate vacuuming as I can while doing the water change. I figure once the fish get larger, I might have to do more frequent water changes to keep up with the fish. :p
leifthebunny is offline  
post #5 of 7 Old 06-11-2007, 09:49 AM
mHeinitz57's Avatar
yeah, there is really no set schedule of when to do water changes and gravel vacs. You will get into your own rythm over time. Basically, if you stir the gravel a tiny bit and notice a good ammount of debris flying up, then gravel vac. A lot depends on your filter too. Generally if you have a 50 gallon filter on a 50 gallon tank, you will be doing water changes about once a week. I always use oversized filters, I have a 75 gallon canister filter on my 47 gallon tank. When I was raising oscars I had a 100 gallon canister on my 35 gallon tank Having a large filter cuts down on maintenance a lot too, I change my water maybe every month or so, about 25%.
One trick you can do is to do a water change and then get the water tested (once it is established) Your nitrates should come down to a safe level. Then in a week, test your water again. If nitrates have built up to a dangerous level, then you know you need to clean your tank once a week. If it is still safe, you may be able to change water every 2 weeks. Just remember that changing smaller ammounts of water at a time causes loess stress on the fish. Instead of doing a 50% water change once a month, it would be better to do a 25% change once every two weeks. The later would be less stressful.

Mike H
mHeinitz57 is offline  
post #6 of 7 Old 06-13-2007, 06:48 PM
New Member
miagrrl's Avatar
a lot of it will determine how many / what type of fish you have, if you have plants... some fish produce more waste than others. I would agree that the 25% weekly is a good starting point. i vac every time- in my large tank i can only get half at a time done, before there is too much water sucked out- so i alternate which side i do each time. i am a firm believer in leaving it alone until cycled, then doing your first water change and weekly thereafter

"Instant gratification takes too long"
miagrrl is offline  
post #7 of 7 Old 06-14-2007, 10:31 PM
Andyandsue's Avatar
All depends on your bio-load, but I do a 25% water change with my gravel vacuum one a week.

If your tank is newly set up you will need to test with a liquid test kit daily and watch your ammonia. As the ammonia goes up, start doing a 25% water change. Keep testing daily and do water changes as much as necessary to keep the water fish-safe (be keeping ammonia and nitrites down). Once your tank is cycled and you have 0 ammonia, 0 nitrites, and some nitrates showing, you can begin your weekly water changes.


Pardon the pun, but I'm hooked!
Andyandsue is offline  

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
water question deoinized water vs distilled water jaysix79 Saltwater Fish 13 02-08-2010 01:42 AM
Questions on my water conditions. Advice on water changes and liquid fertilizer saulat Beginner Planted Aquarium 13 07-05-2009 05:50 PM
White Cloudy Water + Dead Fish after water change HELP!!! eviltuna Tropical Fish Diseases 8 03-05-2008 12:03 AM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome