will diatoms and algae go away with ro/di water?

[celbrise]

i had my tank filled with tap water that was untreated and lately i bought an ro/di filter and switched some water out. i my tank is exploding with diatoms even when i switch the tap water out with ro/di water ( it's only been 2 weeks so i doubt all the tap is out ). i also have some phosphate sponge i bought i didn't remove which probably is contributing to the diatoms. i do have green algae as well that is also exploding and this one is hard as hell to scrub off. just wondering if the green algae will go away along with the diatoms? diatoms i heard are supposed to go away for sure.

also any ideas what can be causing the green algae? literally looks just like diatoms but green and harder to scrub off, grows just as fast. i keep my light on for about 8 hours a day without it on it grows just as much. if not ill just scrub it off with a blade since my tank is glass.

 

[lmforbis]

Your green algae could be coraline if it is hard and crusty on the surface. You probably have phosphate and nitrates feeding the algae. As long as those are present you will have algae.

 

[jay0705]

Its a new tank. Diatoms will go away w time

 

[beaslbob]

just about all the nutrients for algae comes from your bioload not the input water.

Diatoms require silicates however and that is not replaced by feeding your livestock. So eventually the silicates are used up and the diatoms goes away.

But other algae will still be there due to the bioload.

One way to help reduce algae is to use an algae truf scrubber or refugium with macro algae to those get the nutrients not the ugly algae in the display.

my .02