Re: Tom's Bucket O' Mud - Licorice gourami pics page 14
Hi again Mxx,
Sorry about being a bit slow responding, I've been away from home for a while (hence the need for a sustainable tank!), just got back last night.
Mxx said:
Great tank, great journal, very inspiring! I just love the idea of a more or less self-sufficent ecosystem in miniature. And I read through everything in a disjointed fashion, including the other links, and would like to hear a bit more about what you're doing with it now.
Do you feed the fish at all when you're home, or do they get enough to eat from the microfauna? I suppose you could always add an auto feeder for when you're gone, though that detracts a bit from the magic of such a tank. It sounds like the only thing you add is some leaves to feed the invertebrates?
Most of the time all I add is fresh leaves every month or two. Sometimes when I'm home I'll give the fish a bit of a treat to vary their diet a bit, I don't believe it's crucial to keeping them going though. I'm regularly away from home for 5-6 weeks at a time, during which the tank gets no input other than water top-offs.
Mxx said:
But what do you think would be the result if you enriched the tank by adding more nutrients in any form, be it fertilizer or food, would that result in richer microfauna and plant growth, or algae? Do you suspect the nitrogen in the soil and the system will at some point run out, possibly resulting in blue-green algae problems eventually?
I haven't tried adding extra ferts, although I may do when/if the soil becomes depleted. The soil is now 9 months old and was fairly lean to start with, and I imagine that the enormous amazon sword (which has roots throughout the entire substrate) must have consumed a lot of the available nutrients. However, I never prune the leaves when they die off, they just fall back into the tank and replenish the water column.
Mxx said:
What kind of soil did you use? Is it mineralized topsoil? And did it have any organic content in it still? (Which would decompose in time to provide CO2 to the roots of the submerged plants) I'd have thought organic soil would give you a better chance of achieving a carpet than you could with just mineral soil, but I could be wrong.
This was just garden compost (I can't remember the exact makeup, was a John Innes formula, I think JI number 5 from memory), cut about 50/50 with sand. There was a moderate algae bloom in the first few weeks, whilst the plants were establishing themselves and the ammonia was spiking, but since then no issues at all (I get a tiny amount of green spot algae on the glass where the sunlight diffuses through the window).
Mxx said:
Also, I don't know if you'd added any buffers such as dolomite to the soil substrate, but what is your pH and does it tend to stay that way, in case you know?
I've never measured the pH in this tank, my tap water is soft and close to neutral, so I imagine the tank is fairly acidic whith all the humic substances from the leaves breaking down. The fish are soft, acid water species and seem to be doing well.
Mxx said:
Unfortunate about the Glosso, but you decided not to try Dwarf Sags or Marsilea, which is what I was similarly considering as they're supposed to be about the easiest carpeting plants?
I have some issue with the foreground still, there are various of the smaller crypts in there but they are all painfully slow growing in this setup. I have some
E. magdelensis which seems to be doing well but is a little large.
Mxx said:
And finally, you didn't in the end include a refugium to act as a breeding sanctuary for microfauna? In any case it seems with a tank this size and the light fauna it is working for you and isn't thus necessary.
Lot of questions though!... but helpful if you can provide any answers.
Yeah, I decided to try it without the refugium to begin with, and it all seems to be working ok. I still think that one would be a good idea in principle though, I was just too impatient to come up with a good design that wouldn't impact my hardscape when I was setting up.