Blue lights

[Joshifer]

Do blue and violet lights fuel algae growth? I noticed my coralline algae I did have in my rock is fading away. 

 

i know we use white lights for macro algae. Just curious wanna try to save my purple algae. 
 

I also have a 6500k led light and a back chamber. Is chaeto over kill on a 5G? Wanna keep the algae at bay.  I’m still fallowing I’m thinking about doing a bigger tank if I can get a cheap one since I’m playing the waiting game anyway. 

Edited September 26, 2019 by Joshifer

[DFR]

A full spectrum (white light) would be best for all inhabitants that will go into the aquarium (including coralline and corals).  If you are only concerned about the coralline in a fugue or dedicated tank then a grow light or something with more of a focus on the red spectrum would be more beneficial.

[AlanM]

Given sufficient alkalinity, calcium, flow, and time I've had coralline grow even in near darkness and in bright light.  My experience is that it doesn't matter that much for growing coralline algae.  It grew for me on the teeth of the overflow box which were at like 900 PAR and down on the bottom of the tank which was at 25 PAR.  The key will be time.  It does seem to take a while before it really takes off.  Maybe it needs a critical mass of it or something.

[Joshifer]

I guess that ph drop a few weeks ago killed it. Oh well. Thanks guys. 
 

tomorrow I’m gonna go put a hold on some clowns and wait for them to finish qt by them my fallow will be Over. Kinda tempted to have them order designers and wait the extra 2 weeks or whatever it takes. Maybe a da Vinci and a Picasso or a photon.