I have a 200ltr set up with a mixture of plecs,cory's & some tetra's etc.The tank is not overstocked & the water readings are o.k.,ammonia-0,ph-7,nitrite-0 & nitrate about 25. The 'problem' is that the water has a continuous yellow tinge.I know this is not a problem as such but is unsightly.Activated carbon removes the colour but i am afraid of this 'dumping'any impurities back into the water at some point.The filter[Tetratec ex 1200]is cleaned regularly[once a month] & i do two 20% water changes per week to keep the nitrate down. I was wondering if anyone knows of anything i could use as an alternative to carbon to remove the colour. Any suggestions would be appreciated.
if you are changing your carbon regularly it won't dump anything back what is the source of the colour - bogwood? obviously the leachng is finite, but may take a long time, maybe if practicable you could take it out of tank and boil, that will get tannins out quicker??