"RedForeman ©®" wrote in message
...
|| Hey!
|| Green water is always cause by a shock to the biofilter. Say, for

can't say always... because it's NOT always.... green water is caused by
one
of a few things, imbalance in water...either ferts, filter or lights...

--
| RedForeman ©® fabricator and creator of the ratbike streetfighter!!!


quite so Red. There are many ideas as to why green water shows up but it is
normally a deficiency of some sort. If nitrate is limited n a planted tank
and phosphate is too high from either dosing or overfeeding then green water
thrives. Correct this by cutting down on feeding and adding more nitrates
combined with water changes and the green water will disappear. On the other
hand , if nitrates are not limited but are out of balance then green water
also thrives and nitrate dosing must be cut back. It is simply a matter of
checking different things to find out the solution. U.V will eliminate green
water as it kills the free floating algae however if the reason for the
green water is not corrected it will always come back.

Rick