- Thread starter
- #41
I'm considering switching my substrate to BDBS . What size grain is best? Apparently I have a choice between medium and fine.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
I'm done

Its ok to take a break. Toss the plants, put some silk ones, dose some erythromycin to take care of the cyanobacteria…. Clear your head, destress.I don't know what else to do other than start all over.
To be honest I haven't thought about it much. Just because of whee the tank is situated in the house. I would have to put a canister filternon thr floor next to the stand and have about 4 ft of tubing to and from the canister.Have you considered switching from HOBs to a canister filter. There always seem to be used Fluvals on FB Marketplace. In fact, I have a couple I plan to put on marketplace.
I'm formulating a plan to reset this aquarium...
2. Replace my existing HOBs with 2 Tidal 55... maybe add a couple of wavemakers strategically placed for increased flow
3. Replant...
Bacopa australis, Cabomba aquatica, Hydrocotyle leucocephala, Ceratophyllum demersum (floating), Mayaca fluvitalis, Echinodorus amazonicus (probably too big, may have to substitute), Ludwiga inclination Pantanal (possibly too demanding), Eloda najas.
4. Start lights at 100% to make sure of adequate light at substrate level
I definitely need to go back and re-read the entire thread.A Tidal puts out lots of flowI have one. You could also experiment with placing a couple inexpensive surface skimmers to direct flow around your tank, before you invest in new filters.
If you want to do this without co2, I would hold off on floating plants to start. Shading your substrate is not going to do you any favors. You're going to want to use modest light while your plants are getting established, so as to not light the fire under any algae that gets started.
![]()
Algae Control 101: How to prevent algae in an aquarium?
Key steps in preventing algae in an aquarium. Discussion of the role of CO2, light, nutrients and biological filtration in managing algae in a planted tank.www.2hraquarist.com
Algae loves high light! If you have plant stress with high light, you get algae. Worse, the algae explodes fast.
Remember that these plants you just bought were grown with CO2 supplementation. So just moving them to a non-CO2 tank causes plant stress, they have to adjust their internal machinery to cope with the new limit on this resource.
This restructuring will cause them to eject substances from their leaves, that will provoke and feed algae.
If you want to do this without co2, start out with modest light, densely plant large quantities of healthy fresh plants, covering at least 75% of the floor of your tank. Watch the plants carefully and trim off leaves that aren't doing well. Change the water a lot, to flush those ejected plant substances away before they can feed algae.
All this being said, you can set yourself up for CO2 for $200: a decent basic CO2Art regulator for 150 bucks, and a shiny new 5 lb gas cylinder for $50. Your sanity might be cheap at the price, just saying. Also, Black Friday is coming!
I read over the comments at the beginning of your original post here, there's a lot of good advice there for both CO2 and non CO2 approachesIf you haven't already, go back through what people have said
![]()
I am not 100% sure and it seems that Tom has some potentially confusing quotes. But in a recent interview he did mention that when water changing, if the water change is enough to expose the leaves of the plant to the air, then those plants will basically get a massive co2 boost - which he was touting as a good thing - because air has so much co2 vs water. He even suggested letting them sit there 10-20min or so I think so they can get a nice dose. What the quote seems to suggest though (as opposed to the interview I saw) is that exactly this co2 boost leads to unstable co2 levels - which I guess is true? - and it is said that fluctuating co2 levels encourage bba .Can some more people elaborate on the water change/algae relationship? Everything I’ve read and seen say that water changes are your best friend when dealing with an algae outbreak, but the above Tom Barr quote says the opposite. I would like more info…
I am not saying it's right or wrong but I have never rinsed/washed BDBS. I have always just opened the bag and dumped it in.Wash the BDBS really really thoroughly!
Once it's washed, wash it again![]()
