frag tank problem

[reefpeeper]

i just recently set up a 20gal frag tank and a week after setting up it is growing alot of algea. the frags do not look good so i put them back in main tank. the frag tank has a penguin 350 filter and 2 pretty good powerheads for flow. the light is a power compact 2 55w 50/50 placed right on top of tank. when set up i used 50% water from main tank and 50% ro/di water. my question is should i have waited awhile before putting frags in tank? also only have tested calcium, alk, and ph all where good. i do not see why nitrates or phosphate should be high or would they. any ideas?

 

[ficklefins]

Did you place any live rock from your established system into the frag tank, or place the penguin sponge into your regular tank?

 

[reefpeeper]

Did you place any live rock from your established system into the frag tank, or place the penguin sponge into your regular tank?

no i did not

 

[reefboy]

The tank is cycling and for some reason I always get a diatom bloom on new prop systems made from acrylic.

 

[120inwall]

Some types of eggcrate seem to grow algae.

 

[jasert39]

i added a prop tank inline with my normal sump and display and got diatoms in the prop tank (with eggcrate)...no idea why but its going away now.