View Full Version : changed light - changed my calcium I think

07/21/2013, 03:44 PM
I had 135 watts of pc using 50/50 coralife bulbs over my 36" 58 gallon tank for the past 5 months. I changed to my old reefsun 250de mh light about 6 days ago. I have no corals and only 5 yellow tail blue damsels (I know.......they may not behave so good in a while) in the tank w/ 40 lbs brs dry pakuni (now 1/2 covered with coralline).

Is it possible that the change in lighting would cause my calcium to drop significantly. I used to add 1 rounded teaspoon of seachem reef advantage calcium every 4 or 5 days to remain at 420 - 450. Now I have had to add 4 teaspoons over the last 4 days and just got the calcium up to 410. Can the light do that?

07/25/2013, 07:03 PM
I think it could be possible. Coralline algae prefer a lot of light to grow and spread, and growing and spreading requires calcium to consume.