| one more thing, algae lives on sunlight, water and nutrient.
water also contains carbon dioxide in various amounts, degassing removes some of this. algae love carbon dioxide for growth. so that removal of co2 can slow the growth.
it also may be temperature of the water that discourages algae growth or light intensity.
mainly what feeds plants after sunlight and co2 is the nitrates etc.
this enters through feeding- food waste and by product of fish metabolism.
in an unconverted form of ammonia, some plants can use it, though mainly they use the nitrate in large amounts which is an end product of bilogical filtration, plants and algae dont just live on ammonia,nitrite or nitrate.
there are other things that will build up over time.
correct me if im wrong but this biological filter would not remove nitrates!
what removes nitrates from the system is ussually algae, floating plants or water exchange, especially in heavily loaded systems (i guess much higher than the systems you guys are talking) water exchange is used to deal with the end product.
even though it may be less toxic to fish after sending through a bio filter it is still not wanted in the sytem in building quantities.
you can remove it as a gas, the smelly stuff but this requires a dead chamber or expensive gear. |