I've been growing HC in a room at the lab that has small tanks, but decided to try growing HC emersed.

This led to the idea that follows.

It's just growing HC initially as a terrarium plant, which is does quite well as and quickly sends runners and forms a thick mat that's very well rooted.

I used ADA aqua soil amazonia, added enough water to fully saturate the soil without having it come to the surface.

No CO2, no worry about fish uprooting it, algae, water changes pulling it up etc before it roots well.

This can be done for large tanks as well that desire a large rug or mono culture of HC. Rocks can be added before, or after, just not moved around a lot while the grow in period is taking place.

This method surly works for most ground cover plants also.

Once well rooted, growing well, the transition is much less problematic and you have a high biomass, bacteria is formed as well and it takes about 2-3 weeks.

One of the keys is growing it high moisture, so a glass lid or a plastic wrap should be used along with the tank's lighting(1.5 w-2w/gal of standard FL's works pretty well).

Once grown in, fill the tank with water and set up=> instant clean healthy HC.
It could not be easier, no dosing, no CO2 etc(that comes later, but is not nearly as troublesome, since the hardest initial phase is now done).

Some might fine they like terrariums also

Regards,
Tom Barr

plenty of people do this to get HC-mass (growing emersed). Althou ive never seen anyone do it in an aquarium. I cant imagine anyone waiting a couple of weeks to add water to an existing tank I mean, common.. it will taunt you "fill me, fill me".

I see folks do this with fishless cycling everyday on line

The nice thing is that it's easy and reduces any dosing, algae or new tank set up issues. No water changes, very very simple etc.

Regards,
Tom Barr

I think that is an awesome idea. I wish I would have thought of something like that when I set up my tank.

One question though. When you fill the tank up with water and the HC has to convert from emersed to submersed form, won't there be a bunch of "mushy HC" from the emersed parts melting before the new submersed growth fills in?

The HC I got in pots was grown emersed (I believe) and after I planted it, many runners and stems turned to mush and it took a while before I saw new growth.

However, this method sure sounds like it would still work better because the plants are already established with good root and leaf growth. I seems like that would make it a lot hardier and able to make the transition much easier.

Couldn't you do this with most plants that can be grown emersed? Maybe even plant your entire aquarium layout with emersed plants. Grow them in quickly and healthily, get their roots going, then slowly fill the tank up with water.
Could use crypts, HC, rotalas, limnophila, etc.?

Cool idea.

-Mike B-

I'm very interested in experimenting and giving this method a try. I've got a spare 2ft tank where ill try to grow glosso and HC emersed.

I just have one question at the moment. How air-tight does the tank need to be to maintain sufficient moisture? The current cover glass have 2 corners cut for fitting filter and heater cables into the tank. Should I bother to cover these up?

I just lay a glass lid over it

Regards,
Tom Barr

I'm going to try this in my new 5 gal. nano.

Thanks, Tom.

George et al, this is easy as pie.

You have a dense rug, established root systems, zero algae, well cycled N cycle in the sediment(bio already there after 3 weeks).

Add water, CO2, filter and ferts.

People always carry on about how hard it is to start up HC or a new tank.
Well, here's a very simple solution, better and simpler than anyone else's I've ever read.

If you have a simpler easier fool proof no algae and dense rug method, let us know

Why limit/torture ourselves with water if it's not even needed in the start?
Many do and assume they must, but that is their own limitation that they place on themselves.

Be careful about doing that type of behavior in this hobby as well as life.

Regards,
Tom Barr

Just set up a 40cm tank to give this go.

Added some gravel/laterite I had left over on the bottom and then a layer of ADA Amazonia.

Lighting consists of 2x24w Household compacts rated at 5000k each. Each light is equivalent to 100watts.

Some of the HC was in bad condition. It's only been 3 days but I can see some improvement already.

Will keep everyone posted.

Do you have to use CO2 with HC once the tank is full or can you go the non-CO2 method or even Excel route? I have read on other sites that HC can't be grown without CO2. And since Tom has done some things rather easily that others suggest are impossible, I thought I'd ask.
Thanks,
Phil