@hadiosbourne I do get that a lot and actually I am glad you raised that. Just want to go into the volumes a bit more in detail for everyone. I have calculated that a certain volume will reduce NO3 in a certain amount of time. Other factors also affect the performance such as quantity of air flowing through the bag, but, I will keep that for another day and just stay with volumes. Nitra-Guard Bio-Cubes is not an additive, it's a bio-media. Sometimes people will add less to the system thinking it will reduce NO3 by 20% or whatever. This is not the case, rather think of the cubes as media that you use for ammonia removal. If you are producing 1mg/lts of ammonia per day, you will need enough biomedia to remove that. If you add less biomedia than what is required, it will be decreasing the ammonia produced daily, but, your test kit will show that ammonia has risen instead of decreasing. The reason for this is that our test kits tell us the total of all ammonia in the system. They do not say "on the 10th of October between 09h00 and 09h30 there was a dramatic increase in Ammonia production of 0.25mg/lts followed by a sharp decline in the afternoon of just 0.01mg/lts" It will always be the total ammonia concentration present at that moment when the test was performed. So, while adding less will make ammonia rise more slowly in the system, it will still rise. Nitra-Guard Bio-Cubes is exactly the same thing. You need a certain volume to handle a certain amount of NO3
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