sps burnt tips

[luke1234]

Hi guys,
can anyone on here please list me the main reasons for burnt tips???
I have recently started to get a few colonies suffer with this, my cal mag and alk are all stable,
temp is stable as is po4
each tip that gets burnt becomes colonised with green algae , also my hoekesami is losing colour
I have plenty of flow and run 400w halide with 4 narva blue t5s
kind regards Pete

 

[danil]

most common reason for any signs of STN - alkalinity issue. It could be too high for your system. Hard to day with out knowing any numbers.

 

[Chris Lakies]

I think its a sign of high alk. U need to test.

 

[lolgranny]

+1 Alk swings

 

[luke1234]

Thanks guys,
kh is stable at 10- 10.5 salifert
calcium 440 mag 1400 tmc combined test
po4 trace
nitrate undetectable
dose biodigest bacteria 1 ampule per week
2 ml vodka per day and use bubble magus skimmer rated at 1500litre on a 700 litre sps system
heavy stock of fish feeding 7 cubes of frozen rinsed in ro per day
one question is why am i suffering bad algae on the burnt tips if my phosphate is trace
kind regards Pete

 

[GRTTSOU]

You are facing this problem because of your alkalinity level. Try to reduse slowly and maintain natural sea's levels, 7-8max.

 

[dbraun15]

to the prior posters point, because you are dosing a carbon source and bacteria, you need to keep your alk levels at natural levels. In essence, your alk is to high.

 

[aznepydna]

The reason might be high salinity. Make sure your salinity tester is calibrated correctly.