Low alk= better color?
- Thread starter allsps40
- Start date
I would guess nitrates NO3 must be 0ppm and phosphates PO4 must be less than 0,03 ppm.
Thanks for the link.
A ulns is considered a ultra low nutrational system.
This means "according to our test kit standards" we will read zero trates and zero ppm phosphates.
Now with this being said if you run alk in a ulns you will find that the sps will stn. Now in a nutritional system you will notice that the alk can be higher because there are the means of food for the coral to grow from the base to encrust first and then the tips , stated in most acro sps.
With a ulns you need to keep the alk at 7 to 8 because insted of alk burn you get stn.
Low alk in the system does not depend on color it is all about keeping your level dead on and a stable enviorment for sps.
I know my friend has a tank with over 15 fish and he does not by far have a ulns and he keep his alk at 10 which is fine, also he has a 120.
My self who has a ulns and keeps my alk at 7.7, I only have 5 fish in a 75 gallon. I do not feed alot.
This means "according to our test kit standards" we will read zero trates and zero ppm phosphates.
Now with this being said if you run alk in a ulns you will find that the sps will stn. Now in a nutritional system you will notice that the alk can be higher because there are the means of food for the coral to grow from the base to encrust first and then the tips , stated in most acro sps.
With a ulns you need to keep the alk at 7 to 8 because insted of alk burn you get stn.
Low alk in the system does not depend on color it is all about keeping your level dead on and a stable enviorment for sps.
I know my friend has a tank with over 15 fish and he does not by far have a ulns and he keep his alk at 10 which is fine, also he has a 120.
My self who has a ulns and keeps my alk at 7.7, I only have 5 fish in a 75 gallon. I do not feed alot.
dzhuo
Active member
It depends on who you ask. Here is another reasonable definition:
ULNS is a load of detritus: an Ultra Low Nutrient "˜System' is a desert
and the link to the reference of why "L" isn't really "L":
ULNS is not really L and far from UL
Lots of people claim their tanks are ULNS which might not be the case.
No problem
sweet ride
New member
.... just wanted to know your thoughts on what is considered as stable ALK level as the range that have been thrown seems to be about in the 2 point range.
Here's a Dana Riddle article on coral pigmentation. I found it interesting that a higher alk produced better pigments.
http://www.reefs.org/library/talklog/d_riddle_042698.html
http://www.reefs.org/library/talklog/d_riddle_042698.html
kaserpick
Keeping it Simple
If your corals have great color and look healthy at 9 dKH, and you've noticed browning when you lower them, why are still trying to drop your Alkalinity? Every system is different.
I won't say that your trying to lower your Alkalinity without good reason, but based on your post, it seems like your corals seem healthier at a higher dKH. If that's the case, I wouldn't try to lower it, just a thought.
phenom5
Member
+10,002. Stability is far more important than chasing a specific number IME.
