08-04-2011, 01:59 AM
Join Date: Jul 2011
Location: Northern NJ
I have a 10 gal reef and do 50% water changes per week. This takes way more work (at least 10x as much) than doing a 20% change on a 50 gal planted freshwater tanks. This is a fact!
Here is a question for you? If I put less stuff into my tank each week and take less stuff out each week and after doing the infinite series I am at the same point? Am I doing more or less work?
Iím stupid. I need someone like you to explain the details?
Originally Posted by plantbrain
So ~40% dilution .......and that is somehow MORE than 50%?
That's not clear.
PMDD addressed this over 15 years ago:
Near the bottom.
Better than this, let's just use a modeling calculator:
Doing a water changes takes roughly the same time to drag stuff out either way, so if you go to the trouble, might as well go big. That's a fairly obvious practical matter. So you end up doing 4X more labor for less effect at mitigation of any build up.
Seems silly to waste one's time/motivation going small.
You can run the graphing function with 50% once a month and then 20% weekly and then look at the assumed uptake ranges over a few weeks.
With Reefs and the cost of salt mix, this is a larger economic factor, but of little consequence with Freshwater. Still, Reefs/marine systems benefit from large water changes very well.
If you play with chemicals you should know some chemisty.