I have been observing my corals over the last 6 months and I have noticed that they are deteriorating sadly...
My tank went through the following stages:
- When first bought from a local diver (wild caught), they had colors - not so great colors but I could tell which is purple which is green.
- They start to brown out because I had too much nutrients, I had 2 x150W MH 12000K and 4 t5 actinics at that time.
- 2 months ago I started bio pellets and Po4 Rowa. Nitrate and Po4 are undetectible. Colors are still brown except for LPS and zoa. Only acropora SPS are browning out.
- 2 months ago I also switched my lights to 2 x Ecotech Radions and acclimate my corals from 50% intensity to 100% over 2 weeks. Corals are still brown with no sign of improvement but they are growing like usual.
- 2 weeks ago I installed a new refugium with sea grapes and 3 abalones. no effect on coral colors but hair algea looks like it is under control.
- 1 week ago I reduce my Radions back to 50% and reduce photoperiod to 10h from 12h. Now corals are showing lack of colors even brown is slowly disappearing on the corals near the surface. The one down below are still alright (brown).
Water parameters are alk 9, ca 470, mg 1400, po4 nitrate both 0. temp 26.7c, 1025 salinity. I am dosing randy's 2 part.
Tank is a 120cm x 60cm x 60cm 120gal with sump. 2 radions. a vortech mp40. sump running caulerpa grapes with lots of pods playing on the glass.
I wish to have my colors back...
Can you help me see through this and point out which have I done wrong?
Here are the pictures
My tank went through the following stages:
- When first bought from a local diver (wild caught), they had colors - not so great colors but I could tell which is purple which is green.
- They start to brown out because I had too much nutrients, I had 2 x150W MH 12000K and 4 t5 actinics at that time.
- 2 months ago I started bio pellets and Po4 Rowa. Nitrate and Po4 are undetectible. Colors are still brown except for LPS and zoa. Only acropora SPS are browning out.
- 2 months ago I also switched my lights to 2 x Ecotech Radions and acclimate my corals from 50% intensity to 100% over 2 weeks. Corals are still brown with no sign of improvement but they are growing like usual.
- 2 weeks ago I installed a new refugium with sea grapes and 3 abalones. no effect on coral colors but hair algea looks like it is under control.
- 1 week ago I reduce my Radions back to 50% and reduce photoperiod to 10h from 12h. Now corals are showing lack of colors even brown is slowly disappearing on the corals near the surface. The one down below are still alright (brown).
Water parameters are alk 9, ca 470, mg 1400, po4 nitrate both 0. temp 26.7c, 1025 salinity. I am dosing randy's 2 part.
Tank is a 120cm x 60cm x 60cm 120gal with sump. 2 radions. a vortech mp40. sump running caulerpa grapes with lots of pods playing on the glass.
I wish to have my colors back...
Can you help me see through this and point out which have I done wrong?
Here are the pictures