水草情迷

I have a tank with 18" length x 10" height x 10" depth. about 26 L of water.
I am using a T8-15Wx4. As of your previous message, there should be 1L=1W. However, if I turn on 2 tubes or 3 tubes, there are no bubbles. If I turn on 4 tubes, There are few bubbles. Everytime, there are million of bubbles come out from the plant after I changed the water.

I am wondering if this is the water quality or lightering problems.

Should I turn on 2 tube, 3 tube or 4 tube? It seems that 4 tubes is a bit over, right?

相信呢個同水質關係大D。
你換左新水入去，新水的微量原素剛巧就係原來缺少的。
而新水含氧量一般亦較多，兩樣加埋就自然出泡多左。

i am changing water teice every week. how can i improve 含氧量 in my tank?

Simon,
my lightering hours is 16:00-23:00. i am adding an air pump to make more 含氧量 from 00:00-15:00. is this correct? see what will happen in the next few days.
the 含氧量 is getting lower is becuase of too many fishes, right?

just wonder why if 含氧量 too high will kill fishes?

after having air pump for the whole day, turn it off while co2 and lightering is on. there is still no bubbles.
what i can think of is not 含氧量 unless there is rapidly changes in the next few days.
except the 含氧量 of the new water vs old water, the other changes could be the tempature of the water.
now, the temp. in the tank is 26.5 degree. maybe too hot and can't make bubbles?

Any comment?

by the way, i am having air conditioner with a big fan beside it, let see whether the temp of water can drop. see if there are more bubbles with temp down.

i can't think of any other excuse why no bubbles in my tank.

not workable. temp down to 25 degree. the leaves still doesn't go up and no bubbles even for 2 or 3 tubes of light (15W/tube) in a 24L of water.

睇番你個缸，其實草唔係幾多，同埋見到類似紅色草果幾棵生得唔係好健康。
咁你換完水見到果d氣泡，未必係由水草產生出黎。
其他草亦不太茂盛，你個缸開左幾耐？
用乜野肥料？

the leaves do not go upwards when lightering is on. what is the problems exactly? I am turning on 4 tubes with 60W into a 24L of water now. The leaves are still facing downwards.
I made the exact measures of my tank now attached.
the tubes are ada tubes.

以你提供的數據，光就好夠。
見你放左好多個陶樽，有無量過 PH 值？CO2 每秒幾多泡？

另外，前面有篇 post　話含氧量太高會 kill fishes。我真係未聽講，原理係乜？

simon,
as you can see my pic that the plant is not breathing at all even having co2, lightering for 8 hours. Today, I have changed the water again for a test. the plant is breathing a lot again.
So, co2, lightering, water temp. supplyment should not be a problem. (temp is 26.5 degree also after I changed the water) the setting is the same as before.
co2 : 2 bubble per second.
The only possibility is the water quality. MAYBE OVERBREED FISHES? I CAN'T THINK OF ANY OTHER EXCUSE.
PH used to be about 6.0-6.40
I HAVEN'T CALCULATE THE NO3, NH3, NH4 BEFORE. SINCE I HAVE CHANGED THE WATER EARLIER AND MAYBE I CHECK TOMORROW NIGHT.



I AM TAKING MORE PIC HOW THE BUBBLES COME OUT AFTER WATER CHANGED.

this couldn't happen unless someone is bumping pure o2 into tank.
pure oxygen indeed is toxic even for human

_________________
eheim2075 +eheim 2113
ada grand solar2,hariley 150A,75cmx45cmx45cm

thank you guys.
all problem solved. my plants have bubbles now. I was doing testing on water temp, volume of co2, etc. however, all these issue is not the problem.
the only problem occured must be 含氧量. I move 8 fishes to other tank and everything is fine now. I have cut off the yellow leaves and waiting to grow with 2 tubes now.