That is quite a bit of growth for one month. So it came out cleanly last month but fused/cracked this month?
Yep, came out cleanly last month, but fused and cracked this month. Not sure what caused it, but yeah, I just have a bunch of coralline algae in the tank without any other sort of algae. I have to Flipper the glass once a week, but that's not bad considering how much I feed daily.
Welcome to the world of Vortech pumps, it's the #1 reason I gave up on them, the wet sides kept having problems with fusing to the base, or in some cases the friction just wears away at the base and it pulls itself through. Unfortunately ecotech simply offered to sell me more wetsides which was not exactly an ideal solution.
That said, I do have a MP60 which uses the newer model of wetside, so I might replace some on the new tank... MIGHT. Or I might just let it go because they're a huge money sink for me to which they should not be considering how much they cost. I'm happy for those who have never had problems, unfortunately I'm not one of those people.
This seems to be an issue with the older wet sides. The QD wet sides were supposedly rebuilt to address some of the issues that the regular models were having. Ecotech shipped out replacements for the wet sides, if you were having the same issues, as long as they're under warranty. My pumps were built back in January 2013 so they've been out of warranty for awhile now.