Aquatic Plant Central - View Single Post - Estimative Index Dosing Guide
View Single Post
Old 03-31-2006, 01:56 PM   #4 (permalink)
Laith
Senior Member
 
Laith's Avatar
 
Join Date: Sep 2004
Location: Geneva, Switzerland
Posts: 2,307
iTrader Ratings: 0
Laith is a valuable member of the community Laith is a valuable member of the community
Default

Excellent overview!

I'd just like to add a point about the water changes/resetting the tank. If you change 50% of your water once a week, you will *never* have more than a maximum of twice your weekly dosing of fertilizers. And that's without taking into account plant uptake.

For example, if you dose 3mg/l (ppm) of NO3 a day, or 21mg/l a week, your NO3 levels should never reach more that a maximum of 42mg/l. Add in what the plants can use up and the amount will be lower. If they do go above the 42mg/l in this example, you don't have enough light/CO2/plants or you're overstocked with fish.

So obviously if you change less than 50% of the water once a week, or wait longer between water changes, the "reset" aspect will vary and you should adjust your dosing accordingly. I think that the dosages recommend above are based on 50% water changes...
Laith is offline   Reply With Quote