Outdoor Tanks

[Samuel Phan]

Hi Guys,

I have encountered rapid growth of algae in my outdoor tank recently. Reason for that is I have removed up to 80% of the water plants that previously cover the water surface.

Now with the plants removed ... sunlight is allowed to shine direct into the water and thus caused the algae bloom.

My question:
- Is it good for the fish?
- If think coat of algae cover the water surface ... will fish suffocate?
- After few weeks in such water condition and esp when the volume is small (e.g. 30L) ... the
fishes tend to die off. Any explanation?
- In larger tanks (e.g. 600L), the fishes seems to be better off and seems very healthy.
- Seems like when raining, fishes seems to die off in tanks with no over-head nettings. Seems like the netting which prevents the rain from directly hitting the water (although it still eventually goes into the tank) actually helps the fishes to overcome the drastic PH drop ... is it true?

With Best Regards,
Samuel Phan

[Tan Xiao YI]

i live in HDB[bh]

[kennho]

quote:Originally posted by Samuel Phan

Hi Guys,

I have encountered rapid growth of algae in my outdoor tank recently. Reason for that is I have removed up to 80% of the water plants that previously cover the water surface.

Now with the plants removed ... sunlight is allowed to shine direct into the water and thus caused the algae bloom.

How I wish I have a place like that.....

quote:
My question:
- Is it good for the fish?

Depends. Not all fishes can go into such water. Best to take down the parameters and test out with some not so good fish first.

quote:
- If think coat of algae cover the water surface ... will fish suffocate?

Provide some aeration will help. Imagine you are having a Takashi Amano Natural Aquascaping, so natural that the landscape change daily. The algae are the plants and the fish provide the nutrients and CO2. Instead of having artificial light, you have natural light. What do you get as a result ?

quote:
- After few weeks in such water condition and esp when the volume is small (e.g. 30L) ... the fishes tend to die off. Any explanation?

There are more living organisms taking oxygen in such condition. Check the fluctuation of the water temperature and dissolve oxygen. Always provide aeration.

quote:
- Seems like when raining, ......

This one chim question. But use something to buffer water if the tank is small.

[Foo Hong]

Just started 3 exposed outdoor tanks...no problems leh!

[Jonathan_Tan]

i think it could be the pollutants in the air... it gets trapped in the water droplets(rain) den the fish cannot take it den die...
i sometimes experience this... after light rains on hot dusty days..will have some fish dying...

bettas wont suffocate if algae covers the water surface cos they take in air from the surface and they will jump to break a hole in the algae...seen this occur...

[Samuel Phan]

Thanks Guys ... for your contribution.
I think I will have to take some time to observe and tally with the suggestions provided here.

[Samuel Phan]

Kenneth,

You have 10,000L ponds and you are still envy about my 600L tanks???
Dun lah ... how I wish I can have such a large pond ... then I can keep Koi and Goldfish inside [33][33][33]

With Best Regards,
Samuel Phan

[Samuel Phan]

Try having them outside under direct rain.
The fries then to die after a while.

quote:Originally posted by Foo Hong

Just started 3 exposed outdoor tanks...no problems leh!

[kennho]

quote:Originally posted by Samuel Phan


You have 10,000L ponds and you are still envy about my 600L tanks???
Dun lah ... how I wish I can have such a large pond ... then I can keep Koi and Goldfish inside [33][33][33]

Aiya, I wish I can have one at home. If I have a house like that, i will turn it to be an island surrounded by water. hahahahaha. Feng shui lah !
quote:
Try having them outside under direct rain.
The fries then to die after a while.

Have no chance to keep fries under sun. Maybe I try one fine day and see how. Why not after 1.5 mth old ? At least the fries are strong enough to withstand any fluctuation of temperature and pH. Or maybe just for female.

another thing you might like to try - instead of those floating plants, use duckweed and guanyin bamboo inserting thru a piece of foam. At least you culture your own bamboo and once in a while trim the bamboo for indoor use. 1 shot kill 2 birds.

or even java moss .... anything for indoor, bring outdoor to cultivate.

[Samuel Phan]

Duck weed??? Too dirty.
Java Moss??? Tried leow ... quite good and they grow quite fast due to outdoor condition.

1.5 months fries??? Yep ... this is what I normally do ... but sometime they still die ... so can be quite risky. Although the reward is always that they grow very fast and very large.

See how lah ... might expand further ... to build my own "Island". :)

[kennho]

duck weed dirty meh ? kekekekeke .... sometime, this outdoor hobby need some creativity to make it more fun.

[Dr Hsu]

Have been thinking of changing my outdoor urns to duckweed instead of water lettuce, salvinia and this other [cr] floating plant....looks really nice but is a pest! Overgrows too quickly and a [cr] to eliminate completely - no success yet!

[Foo Hong]

slavinnia multiplies like rabbits, water hyacinth is the best.

[Jonathan_Tan]

my fav still water lettuce...

[Jonathan_Tan]

my fav still water lettuce...

[Phil]

Hi Sam, I have no problems exposing them to rain or shine in out door tanks. A few may die initially probably due to adaptation to new environment and water but once the batch is used to it I noticed that they do strive to a ripe old age. Incidentally volume of water is also important. I am of the opinion that if there is sufficient water like in my Koi size ponds, temperature tends to be more stable and the bettas appear healthier and less likely to fall ill. Finnage of course leaves much to be desired.


quote:Originally posted by Samuel Phan

Hi Guys,


My question:

- Seems like when raining, fishes seems to die off in tanks with no over-head nettings. Seems like the netting which prevents the rain from directly hitting the water (although it still eventually goes into the tank) actually helps the fishes to overcome the drastic PH drop ... is it true?

With Best Regards,
Samuel Phan

[Phil]

Hi Sam, I have no problems exposing them to rain or shine in out door tanks. A few may die initially probably due to adaptation to new environment and water but once the batch is used to it I noticed that they do strive to a ripe old age. Incidentally volume of water is also important. I am of the opinion that if there is sufficient water like in my Koi size ponds, temperature tends to be more stable and the bettas appear healthier and less likely to fall ill. Finnage of course leaves much to be desired.


quote:Originally posted by Samuel Phan

Hi Guys,


My question:

- Seems like when raining, fishes seems to die off in tanks with no over-head nettings. Seems like the netting which prevents the rain from directly hitting the water (although it still eventually goes into the tank) actually helps the fishes to overcome the drastic PH drop ... is it true?

With Best Regards,
Samuel Phan

[Samuel Phan]

Hi Doc,

Need Water Hyacinth? I have ...

Hi Phil,
Maybe the rain in Indonesia is less toxic than Singapore.
Less acidic ..

[Samuel Phan]

Hi Doc,

Need Water Hyacinth? I have ...

Hi Phil,
Maybe the rain in Indonesia is less toxic than Singapore.
Less acidic ..