controlling spot algae

[fighteryeo]

how to control??? cause i never add any fert but i still have spot algae happenning and my sae and oto like not helping alot, so wat causes spot algae, issit i need to add more plants to absorb more co2 to compete with the algae???

[lorba]

See this link and fill in whatever you can. Guys here will defintely lend u a hand.