Re: experts please read, I need help! water changes
<a href=showthread.php?s=&postid=12516458#post12516458 target=_blank>Originally posted</a> by r0bin
I have no sump, so I change directly in the tank. I have had the same water change procedure for 4 years. Now in the last 4 months when I change water my fish turn pale, swim in circles or along the sides of the tank in an up and down pattern. After a few hours this stops. I cannot figure out what is wrong. I am matching temp., PH, and salt content. I use proper PH 8.2 on the new water and instant ocean. I change 10 gal. at a time. I cut all power to my tank except the light syphon out the 10 gals. and then pump back the new 10. I mix the water anywhere from 24-48 hours ahead, I use distilled from wal-mart. I drop in a heater and powerhead in a rubbermaid container. I am puzzled. Any ideas?
First off I'm assuming this is the 75gal tank and all equipment is listed under your profile?
2nd, what fish (include sizes), corals and other inverts do you have in the tank? Which of these fish are behaving strangly after your WC?
What type of sandbed/filtration and how much live rock do you have in the tank? How old is this?
How often and what do you feed the tank? Can we see a picture of the tank? Do you run carbon?
It would be helpful if you could do ammonia, nitrite, nitrate, pH, alkalinity tests and provide the results. How are you measuring your salinity? (Do not use those plastic lever-arm hydrometers; although this should not matter that much as long as results are consistent between the two different water samples)
When are you testing the make up water before you have been adding the "proper pH 8.2"?
I'm going to go out on a limb here not really having much background information from you on your tank & inhabitants set-up, with that whatever is in the proper pH product is binding oxygen and as you add it to the system the excess product, or something in it (none should be needed with a proper salt mix) is binding the O2 in the tank water as well. I think mixing 10 gal with a powerhead for 24-48 hours oxygenates the water well enough that it should not cause problems when adding it to the tank.
My other guess at this point would be that you are having an slight ammonia problem and as you add the newly made up water it aerates the tank causing the ammonia to temporarily spike.
Whatever the case, we need more information about your setup and its inhabitants and your routine maintenance with the tank.