Growing HC

[blue33]

Holding in the water column and raises up makes alot of different. You can have lots of ppm, just like you can inject 10bps, your plant may not absorb that. The plant can tell you but not the ppm.

[Tamama]

Hi Tamama, what is the temperature of your tank? Do you use a chiller? I have a strange issue, when i dip the Dymax thermometer probe into the bottom of the tank it shows 29.5 deg but when the probe is above water level it shows around 28 deg. Any ideas why there is a difference? Tks..

I read that HC will only grow in low temperature & hence i think my HC will melt in this high temperature like 29.5. Btw, mine is a 4 ft tank.

I am using a chiller and my water temperature is about 23/24C. I guess why the water surface is cooler is because of the evaporation.

[Shadow]

Actually Green House(sealing emmersed) effect and inside the tank is different, inside the tank when temperature is high, CO2 is low(cold temperature richer CO2)

Holding in the water column and raises up makes alot of different. You can have lots of ppm, just like you can inject 10bps, your plant may not absorb that. The plant can tell you but not the ppm.

That exactly the point I'm trying to make. You can always inject more CO2 to the point where water can't hold it anymore. High water temp indeed reduce the ability of water to hold CO2 but reduce by how much? As long as the amount of CO2 needed for plants is available, CO2 wise it does not really matter for plants and you can always supplement with other source if necessary.

That is why I have no problem growing HC at 28-30 degree C as long as I can keep up with plant needs which by the way increases as the temperature increase.

[blue33]

lol... is it? well at the same time your fauna suffer also. water temperature is an important issue in planted tank. warm temperature does speed up the plant growth but bad for CO2 and plant appearance. most documentary shows cold water has much higher CO2 and why they said so because they have the equipment to check but we dont.

[Shadow]

... come back again to original argument .... this will loop forever unless I understand your concern .

From your post (#19 and #24) your keep pointing out that cold temperature richer CO2. I assume your concern is at high temperature CO2 level is low, thus unable to satisfy plants CO2 need. Is this correct?

Disregard with plants appearance that would be totally different story, some plants does show differences, others doesn't show any noticeable different or no different at all.

[barmby]

I think most of the time, we tell beginner to do CO2 at 20-30ppm because it makes life easier for them to start.

However, I am sure many other, veteran alike - do not need 20-30ppm. One reason out of many others ..because they dislike to see bubble mist all the time in their tank. But then.. they are veteran, they did many other things, tweak the system and plant in weird way that it is good for them.

Therefore, Shadow, and blue33 are experienced farmers in their own ways. What works .. might not be for others...

In the end, we tell beginner - more CO2 is good.




Coincidently in sunny Singapore the most successful tank of Hemianthus callitrichoides has been tanks set up with chiller and auto- CO2 feeding.

[kimchi]

Hi, anyone know whether a Hailea 150 chiller is good enough for a 4 ft tank with around 330 liters of water?

[Shadow]

for 4ft, I will go for at least 1/4 hp. If not mistaken Hailea 150 is only 1/10 hp.

[reveru]

i'm using hailea 150 for my 2 feet. definitely not enough for 4 ft. kick in period for me about 40 mins, kick out about 2-3 hours.

[kimchi]

Hi Guys, thanks for the reply. In this case, i think only Hailea HC-300 or HC-500 can be used for my 4 ft tank. Any ideas what the selling price for these 2 models? Thanks.

[dew]

HC is Hemianthus? Looks like very thick bush, don't know if you keep small shrimplets will they get stuck inside anot?

I feel mini Pellia looks nicer, maybe more shrimps friendly.

[Limy]

I don't think shrimplets will get stuck inside though.. lol..

[kimchi]

I bought HC on sponge from LFS & wonder how to make it sink in the sand? I have a few cherry red shrimps & they seem like to eat them. Is that the reason why those HC i bought earlier can't survive? Anyone have the same experience? Thanks.

[madnugget]

it is advisable to remove the HC from the sponge and plant it directly into soil. your HC survival rate is definitely not due to your shrimps "eating" it..

[bigfthing]

I know its not a recent thread but i still like to ask what do you do when those HC melt? They form like dark cotton thing, don't know if it's a good description but hope you all know what i mean! Do we have to remove them cause if you try to siphon them out, the remaining HC might get suck out as well! What would you do?

[ahkarboy]

HI guys, its been a while since i've hopped on this forum and all but i'm in australia at the moment, sydney. My friends haave bought me an aquarium as a birthday gift and i was wondering if HC (Hemianthus collitrichoides) can be grown in a low tech tank.

2ft tank, i'm gonna get 2x 24W T5 lights & DIY CO2.
NO base fert. Just gravel. Running a hang on filter.

cheers.

[edsel]

I believe HC can thrive n low tgech tank. But if you're injecting DIY CO2, that wouldn't be considered as low tech anymore.

[ahkarboy]

i'm pretty sure DIY CO2 is deemed as low tech. no?

[barmby]

DIY CO2 equate to inconsistent of CO2. This might be the root cause.

[Shadow]

low tech and high tech is depend on your light. If your tank have hight light wattage means you need CO2 and fert to keep up with plant needs.