Tank crashing...could it be due to these?

[Son Of Skyline]

Aw man...can't believe so many of us are having similar problems!

Thanks everyone. I guess the first thing I should check out is my nighttime pH (and i just sold my pH monitor!!!). Come to think of it I did stop using kalk about a couple months ago, however i've gone without kalk in the past and had no problems.

Not sure about the RO water but my prefilters were pretty dirty so I just replaced them (thanks Jesse!). I've heard that i should periodically "flush" my RO membrane but i have no idea how to do it on my unit. Algae isn't a big problems these days though.

I want to try, but I'm kinda scared of doing a huge water change. My rbta seems to get pretty ****ed off even when i do my standard 4gal change! Is everyone's rbta as sensitive as mine?

I'm not using a refugium or any reverse photoperiod. If I find my pH is low then maybe this is a good idea.

Haven't checked my Mg in awhile so I'll definitely have to do this.

Hopefully we'll all be able to figure our tanks out!