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Pacific Northwest Reefers
- Jan 19, 2020
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I had 1/4 inch of crud in the sump with countless bristleworms. For what it’s worth, I never saw anything on the sand that looked to be bacterial in nature. There was a little activity evidenced by gas bubbles about an inch under the surface, and worm holes but apart from that it looked strangely dead. I’m guessing the small particle size prevented detritus entering the bed as when I removed this bed it was totally clean, no crud, nowt. This was a Kalkwasser replenished system.Could you say whether the amount of the fluffy detritus that typically collects in a sump was different with play sand?
I know you're being flip, but just to be clear...Boy,
All this home brewed science whittled down to... sand is worthless.
I've heard the BRS guys say that bare bottom seems to have a more extended and annoying nuisance phase than sandbed. I haven't messed with BB systems enough to know.How does this mesh with peoples experiences with how sandless tanks are so much harder to get running? Is that all just placebo and misattribution?
I don't think so, but it bugs me a little. I'll feel better about this after I make some super juiced up nitrifier sand and can measure actual rapid nitrification rates with the same protocol.Could the process of taking the sand from the tank and putting it in a test vessel actually kill or shock the microbiome in there?
I think that reason that a lot of people believe that a tank with sand matures a lot faster than a bare bottom tank may be because the sand will probably generally cause a lot more detritus buildup in the aquarium. I would guess that this would generally cause a lot more fulvic/humic acid available in the aquarium. I believe this could possibly help a tank "mature" faster because there may be a very significant number of bacteria and algae that really benefit and/or require humic substances. One example may be my sulfur denitrator, I have read that the bacteria that is most commonly believed to grow in it may require humic substances to be able to grow.I know you're being flip, but just to be clear...
My data is only about sand nitrification, and so far it says that in some tanks sand nitrification is a very small part ( < 10% ) of the ammonia processing of the system.
There could be systems that have high sand nitrification, or maybe not. Maybe something else always steps up to process the bulk of the ammonia. It's worth thinking about what actually has high contact / high flow rate with the ammonia that's mostly in the water. (Coral polyps, algae, film on high rocks, filter pads, socks etc, sand not usually so much).
I've heard the BRS guys say that bare bottom seems to have a more extended and annoying nuisance phase than sandbed. I haven't messed with BB systems enough to know.
But IF it's true, and IF sandbed nitrification is generally low, then that might point to the fact there's a lot of microbial activity that isn't nitrifiers. Microbiome maturity might be a lot more complex than just ammonia processing.
I don't think so, but it bugs me a little. I'll feel better about this after I make some super juiced up nitrifier sand and can measure actual rapid nitrification rates with the same protocol.
Saw this today - on topic:
Yes, I was told I HAD to have a sand bed when I started reefing years ago. Now that I’ve learned a few things, Thanks to you, Taricha and a couple others. I don’t believe it anymore.That's never made sense, if by pH buffering you literally mean keeping the pH up.
It's almost comical how the statements are potentially-true but mostly not.so, is there anything on this label that is actually true?!! Lol!!
But I do run a reverse undergravel filter so I get circulation through the entire thing.
So "uneaten food and waste" in a sandbed is small - but it still exists. Algae as well as pods, worms and various other sandbed microfauna eat and are eaten and die in the sandbed.
So if my sandbed is largely absent of nitrifiers, then the ammonia generated there would just hang around until some "algae" (cyano, diatoms, dinos, gha etc) fills the niche. It's not like my corals can come down and get it, or would start new colonies in the sand.
I doubt it, but I have no idea.