i need some help! algue is growing in my tank(the glass surface)
how to get rid of the algue?
i hate to wash them eveyweek
using 4x2x2 feet tanks with the filter under the main tank(sump tank?)

Obviously the algae is caused by the presence of high level of nitrate on your system. The end product of most filter system is nitrate.

Fish Waste >> Ammonia >> Nitrite >> Nitrate

To get rid of Nitrate, you can either change water regularly or install a Trickle Filter to cut down the nitrate.

Cheers

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beside that, algae grow due to the strong lighting... so, reduce the time period of yr lighting.

This is from my experience. I had this problem and changing water did not really kill all the algae, the water turned greenish again in just 3 days.

Then I bought an algae solution, used it once. The water cleared up, but the fish/turtles won't eat! Then I changed all the water....90%++ (I got really fed up). Put a towel behind the aquarium to block direct sunlight. Now everything is fine. Water is clear, fish/turtles eating.

Hope this helps.

ai yo...everyone knew that. Any tank or water exploring under sun light. Sure will hv green water problem.

Water that are exposed to Sunlight all the time can be very clear if you are able to maintain a low nitrate level in the water. My pond water is 100% under the sun and what I have a Trickle Filter that is 5ft tall that work beautifully to reduce the nitrate level to real minimum. Once nitrate is low, algae will not grow that much at all.

I have also did with with small DIY filter that is able to remove nitrate efficiently in aquarium.

Hence for those who want to get rid of green water or get rid of nitrate, please consider installing a Trickle Filter.

Cheers

ya...pond and tank is different. just like u said u got 5ft tall filter.... and do u think it can implement indoor for a tank? unless you stay in bunglow and using 8-10ft tank...

or...dont keep any fishes.

For aquarium, what we did is to allocate one corner as trickle filter and with the aquarium of 2 feet or 2.5 feet, we are still be able to get good results. In addition, we also put on some over trickle filter that is all in all two feet tall and by letting the water drip down slowly, the effect is till very good. Something worth considering.

Cheers

Then this is not apply to planted tank.

what's trickle filter?
where to get??
do you have a pic on how it looks like ?
tq