Most effective biofilter media by size? - Page 2 - The Planted Tank Forum
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post #16 of 19 (permalink) Old 02-06-2020, 09:27 PM
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Originally Posted by Leeatl View Post
The main reason I think is they are planted tanks! The plants will do a better job of converting nitrates than any media , or at least that is my thoughts .
Absolutely correct with planted tanks. That's why you see all over Youtube planted tanks with light fish loads with Matrix. Oh well...
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post #17 of 19 (permalink) Old 02-06-2020, 10:07 PM
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Afaik the K2 is a great media, according to the monster fish keepers. They however are exclusively using sumps or DIY dripfilters with that media.
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post #18 of 19 (permalink) Old 02-06-2020, 10:10 PM
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In my reef days, I used everything: ceramic rings and bio balls, lady's hair curlers, even plastic army men in my sumps, all seemed to work. I'm inclined to believe that in most aquariums the nitrogen load isn't so high as to need millions of square inches of surface area for bacteria colonization and even if we had it, it wouldn't all be utilized. In your tank with just snails and shrimp, I wouldn't expect much of a bioload at all. And every grain of sand, pebble of gravel, hardscape, the glass itself and so on will be used by bacteria -plus growing plants are quite good at removing nitrogen. In my own planted tanks, I don't use any bio media. When setting up a new filter, the first thing I do is toss those rings aside. Depending on the tank, I either leave the space empty or replace them with more mechanical media.
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post #19 of 19 (permalink) Old 02-09-2020, 02:37 PM Thread Starter
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Thanks for the reality check, @Blue Ridge Reef. I'm massively overstocked by the usual guidelines of, for example, "one snail of species X per 5 gallons"; since those same guidelines list supplemental food choices, I assumed they were referring to bioload.

I'd like to use those extra spaces for mechanical media as suggested, but haven't worked out how. The only filter material I have local access to is the bonded blue-and-white filter floss where one is finer than the other, so two layers don't really make sense. I could put a layer of Eheim Mech under the floss but doubt it would be useful in such a low quantity.

As for the void between the floss area and the impeller, a layer of floss or Mech there doesn't make sense for obvious reasons. The only media I can think of would have been the Substrat Pro or a tiny container of Purigen, should such a thing exist. Should I get a green lace shrimp at some point, even Purigen is pointless.

I'm aware that these extra layers I'm talking about would slow the filter a bit; that's a good thing though, as I'm keeping a canopy of floaters and the current flow is a bit overly energetic.

Snail Glades,
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