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I have tested the ammonia test multiple times (before starting) - so that I would get an idea of a consistent way to do it. The tank the rock came from had 0 ammonia (that yellow color as well) - as Did RODI and Tap water. So - IDK - perhaps some of the so-called 'false readings' are actually - true readings - that are not causing a problem because of the pH of the tank. Will see if I continue to have consistent results. (Though I don't show pictures of each test - each one is done in duplicate)That is a very nice yellow! It’s rare to actually see that!
Dark would be cool just to see how much photosynthesis really usesFyi - doctors appts today -etc - I 've responded to some threads - but bottom line - both tanks - are ammonia free. Tomorrow - I want to do one of 2 things - (I think I should) - repeat the first experiment - and get results - OR - as @sixty_reefer suggested - put both tanks in the dark. @Lasse
What about a tank that had 75x+ turnover I wonder. @KimG I recall saying in higher flow it tended to dislodge the bacteria in some way?I will add 2 ppm tomorrow - then then next experiment will be both dark.... I think this suggests strongly that one cannot just count on the surface are to remove ammonia
Not entirely what I was saying. My experience is that selective pressures can determine how and where bacteria grow. If there was no flow i was afraid that bacteria would grow more loosely and be removed more easily. High flow would probably be good in helping the robustness of the bacteria
Fantastic workHere are the final results of Experiment 1 - Which basically confirm the results of @Coxey81 - and @sixty_reefer - that the LIT rock from the display tank processes ammonia more quickly than the sump rock in a dark tank
Tank 1 - 2 ppm Ammonia - Sump Rock (Dark). Processed all ammonia BY 96 hours
Tank 2 - 2 ppm Ammonia - Rock from Display (Lit) Processed all ammonia BY 72 hours
5 gallon Tank, HOB Filter power head identical Heater, water, .52 Lbs Rock.
1) - I´ll think that the API nitrite test is not sensitive enough - I would use Hanna ULR marine nitrite checker
2) - if you already start the experiment in darkness for both two - keep on with that - if not - think of just switching the light - have the former lighted stones in darkness and illuminate the one that was in darkness in the first run. I will expect that the differences is done by photosynthesis