30% over the month total or 30% single change once a month?
Each month but could also be done through out the month
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30% over the month total or 30% single change once a month?
I personally don't think that there is a "magical" amount of water changes, I think consistency with the size and frequency of water changes is more important. Especially with the advances in filtration (pellets, ATS, better skimmers.)
OK, and?
I stand by my opinion, water changes are done to add, balance or, remove. With dosing and advanced filtration large water changes are no longer needed.
B you are right to a point toxins and some elements add up with time even using carbon and specially if you are doing 2 part you have to do water changes due to ionic balance. At one point the levels are not gonna be balance. Also salinity will climb up after time when using 2 part and eventually you will endup trying to compensate by adding fresh water and then realising that magnesium would start to drop which will force yiu to adjust it there fore salinity climbing again then the chasing battle will begin.
The reason I said a magic number was cause study was done and there for 30 % water changes showed after a period of time more beneficial than smaller water changes
That article was published in 2005, the game has changed. I sure as heck don't follow the guidelines set forth back then, do you have a pound of rocks per gallon? I know I don't have 180 pounds of rock.
Consistency is the only form of magic in the reefing hobby.
I also would rather do small water changes, I can change 5 gallons and never shut anything off and only takes a few minutes. I am stepping it up a little to remove some nitrate. Tried vodka dosing and don't like how the coral responded.
A small eater change would note change hardly anything same for auto water change daily is not useful
The reason I said a magic number was cause study was done and there for 30 % water changes showed after a period of time more beneficial than smaller water changes
Large water changes are more efficient than smaller ones. To say they're not useful is very inaccurate, even by the article you linked (which I read before setting up my automatic water changes). On average, they're about 4% less efficient if I remember correctly. For me, to oh-so-slightly decrease the inefficiency of automatic water changes, I pump new water directly in front of my return pump so it goes straight into the tank and take out just before the return water gets back to the return pump. How much effect does this have? I have no idea, but it makes me feel a little better. It HAS to be a lot better than having the removal and intake in the exact same spot as that would take a lot of new water out with the old, which would completely defeat the purpose.
I'm fine with them being less efficient. I hate water changes and am fine with doing a gallon or two per day automatically and having consistent water changes done as opposed to having 4% more efficient water changes, but having to spend an hour to do them. At the end of the day, my tank is looking much better with lots of small water changes than it was with no water changes, and that's a good thing. :)
Brandon