I should mention, the reason for the low blue was ( I was told) my BHA... I never want to seeIncrease the blue portion of light. Plants need equal amounts of red and blue light.
Increase the duration of light. Have the timer come on a few hours earlier and go off at the same time as it normally does. Plants can have up to 16 hours of light per day but need 8 hours of rest.
I've lowered the blue spec because before I bought the light 3-4 yrs ago, no algae was present, 3months later my tank was over-run with BHA: over plants, rocks even covered most of the gravel.Increase the blue portion of light. Plants need equal amounts of red and blue light.
Increase the duration of light. Have the timer come on a few hours earlier and go off at the same time as it normally does. Plants can have up to 16 hours of light per day but need 8 hours of rest.
I binned the lot. The lfs said the blue light was to blame and not really suitable for a trop tank, I'll increase it another 20% and and another hr to the start ?