I should add some side notes to those of you that are following this thread
If you have persistant nitrate issues, Bak alone can take some time in getting on top of the issue. So adding the highly potent Ultra Bio to the mix you are adding extremely powerful denitrification bacteria to the tank daily on a controlled level.
adding bio and bak at the same time will destroy ALL bad nutrients fast, this goes for ANY tank.
Ultra bio is the bacteria and Ultra Bak is the food source.
If you just add Ultra Bak, you will in time eliminate the bad guys from the tank, but it takes time as you are boosting the already existing biological loading of your system by direct feeding. By adding Bio you are also massively increasing the amount of bacteria in the tank which then the Ultra Bak will feed.
Result a full LN system!
Low
Nutrient