Survey re: water changes, etc.

Over the years, I have heard and read so many different things regarding how often to change your water and how much to change that I would be interested in doing a survey of what aquarium owners actually do.

If you could post:

The size of your tank
Whether it is fish only, reef, other
How often you change your water
What percentage of the water you change

I think this would be very helpful to others.

P.S. I am also interested in how many buy their saltwater or make it at home. I used to make mine, but the time involved made me reconsider.

 

150g
Reef
Every 2 weeks
5%
Have R/O unit

 

46 gal bow front reef tank, canister filter, protein skimmer, I do a 10-15% every week and right before a change i give a healthy top off of RO water to make sure the salinity doesn't change to much, i also let the new water sit for a day to get the same temp as my room

 

Here goes; 55 Gal. with a built in over flow and Megaflow 1 sump. Reef set up. Water change once a month, 20% and use Instant Ocean that I mix myself (i have a five stage RO/DI unit.

 

120 gal
every 2 weeks
10%
IO salt

 

Reef - 75 tank, 37 fuge and 50 sump - 15 gallons every 2 weeks.

Seahorse, fish and coral tank - 56 gallon - 10 gallons every Saturday.

Frag Tank - 20 gallon long - 2 gallons when I remember...

5 stage spectra-pure RODI and nothing but Reef Crystals...

 

Massive 5.5 gal. Nano reef.. Water change whenever I feel like it... Usually once a month, 2 at the most..

 

72 Gallon Reef
Once every 3 months or so
20%
make my own

*note: i dose my tank to keep things right*

 

For the 75g tank I took down, the operating water volume was about 100g....

Mixed fish/reef, monthly, 10 gallons, RO/DI on site and ReefCrystal mix...

The plan for the 120g tank, operating water volume estimated to be 200g

Mixed fish/reef, monthly, 20 gallons, RO/DI on site and ReefCrystal mix...