What is this?

[JizzHut]

had only 1 white flower thingy in my tank but it has grown quite abit

are there any effective way to remove these?

and what are the white flower thingy?

Currently i feed twice a day, dose coral once a day , do 10% of WC every week after WC clean sand bed.

i dont have any po4 or no3 problems but why are they taking over my tank?

please help! all comments are welcome good or bad

Thnaks

[JizzHut]

closer shot

[iskay]

First 2 photos are those of sprouting algae. Last 2 seems to be of a sponge.

[JizzHut]

shoould i use toothbrush to get it off? i tried to clean the aglae but i think whenever i clean it the next day got X 2 . should i also get rid of the sponge?

[iskay]

Algae will multiply the more you try to physically remove them ( includes toothbrushing...) The only effective way to control them is to keep nutrient levels to the minimum - this is a tedious thing even for seasoned hobbyists. You can consider using chemical media like activated carbon, granulated ferric oxide, nitrate reduction compounds, etc...

Sponge are actually useful because they absorb nutrients, leave them along. But note that your photo was not clear enough to provide positive ID.