Super fast nitro cycle

[ckusnierek]

After seting my tank up only a week ago it apears to have already completed it's cycle. WOW that was fast. Here are my specs and test readings:

75 Gallon
proclear 125 wet/dry
proclear 150 skimmer
100-120 lbs FULLY CURED Live rock
200 w PC lighting 50/50

tests:
PH 8.4
Amonioa 0
nitrites 0
nitrates 5
calcium 400
alkalinity 11

On monday the ALK was 17 but was comming down 1dkh/day On teusday I started to notice brown alge by thrusday it was covering everything.

There where mushrooms, buttons and toadstool on the LR that didn't look so good mid week but now looks great.

Isn't this an extreemly fast cycle??? I would like to hear about others experiences like mine. is this normal??

Thanks alot
Chris

[VWD]

It is possible with fully cured rock, take caution and time, Still don't ruch it, It may show 0 on all the reading, But may not be able to handle a big bio load right off, No need to rush

[salt-rookie]

The brown is most likely diatoms, rather than algae. If it is cycled....add fish SLOWLY! You don't know how much your bioload will handle.