Greenish water - suspect filter? Canister Filter Tips?

[chambo]

My water of late has been tending to have a greenisg ting to it. The Glass is clean, no formation on plants etc - purely in the water.
I change 10 -15% of the tank water on a daily basis (bare bottom Tank).
The water is souced from my rain water tank. However the same water is used in my 2ft breeding tank and the water stays clear.

I pressume the issue would be related to the Canister filter?

I have a 1500Ltr unit with a 4 tray filtration system:
Open black sponge
Carbon
Ceremic Noddles
white closed type sponge


All the above media came with the unit at time of purchase.


Is there any tips or suggestions in relation to Canister filters that I can do to keep the water in my discus tank at it's best?

[ILLUSN]

green water is usually caused by too much nutrient and too much light, try a black out.

if it keeps up you might have a bacterial bloom.

[chambo]

By Blackout I pressume not use the tank light for several days?

[bartek]

Yes that what ILLUSN means.

Another good idea is to invest in a UV light.

[chambo]

Yes that what ILLUSN means.

Another good idea is to invest in a UV light.

Can I simply purchase a UV tube for my fluro light fitting, or do I need to purchase a different lighting system?

[ILLUSN]

a uv is a filter ad on it will cost you about $300 for a decent one, or an internal with its own pump for around $200.

by blackout i mean turn off your light and throw a sheet or blanket over the tank for 3day, you want0 light to kill the algae.

whats your NO2/NO3?

[chambo]

I only have basic testing equipment.

Read:
PH
Amonia
KH

I may need to invest in one of those "test lab" kits
that come with all the tests for most parramaters?

Will give the blanket a shot


Keeping Fish is not cheap

[bartek]

You really need to get kits to test Nitrate and Nitrite.

[chambo]

As these the only essentials you would recomend I ensure a kit has?

PH
Amonia
Nitrate
Nitrite
KH

[ILLUSN]

that will be plenty, an iron test kit if you have a planted tank would be the only thing i'd add.