We recently acquired a 25kg bag of ocean rock from our LFS.
In the 25kg bag, all pieces are fine bar one, which is about a foot in diameter and way too large for the tank.. We made a big deal about it at the time of purchase (asked to see other pieces etc), but were told that they couldn't open another bag for us as they didn't have enough display space and open bags can't be sold as a 25kg bag. We were told not to worry as it would easily break into smaller pieces with a hammer and chisel.
Out come the hammer (ordinary general purpose hammer) and masonry chisel, and there's little to no chance of it breaking up.
Is it worth me going and getting a bloody big mallet and trying again, or is this a no go?
Also worried the force needed to break this thing is greater than the paving slab we are trying to break it on can stand...
In the summer we felt we were getting overwhelmed with juveniles, so caught the vast majority of the largest ones and moved them out to a separate tank. They stayed there and grew for about 3 months. We planned to give them away.
Decided to keep them in September and put them back in the main colony. All of the original batch of fry that we grew out have survived, which I didn't expect... They have reached the age over the past few weeks where you can identify the females (starting to darken up, and do the whole female entice dance).
From our original stock 3 males and 3 females are going strong and still in their original pairings. One of the male is still without a mate. Offspring, we must have 30+ ranging from newborn to two thirds size.
They are still producing regular fry, but the majority don't seem to be reaching maturity anymore, I'm wondering if they are being eaten now the colony is getting larger.
Finally :P One of the 3rd or 4th batch of fry I noticed had a mutated left eye (no pupil). Probably about 5 months old now. It's still alive, but has substantially stunted growth, and over the past month seems to have been rejected by the others (swims around mid tank and around the filter, not around it's original territory).
How are you finding territorial issues with the ones that are the size of the parents? Our oldest batch are about half the size of the female, so still quite small. We were really worried about them causing issues with the rest of the colony eventually, and it's not really practical to keep so many in our 70litre tank, so have started moving the biggest ones out (as they just keep breeding!)
Multies are doing really well. We lost 2 spare males very quickly which was sort of to be expected. Spare males seem to get bullied away, completely put in a corner, they barely came out to eat.... Unfortunatly a female died a couple of weeks ago too, which was quite sudden with no obvious cause.
We now have have a total of 7 adults left, 3 females 4 males. 2 of the females are "owned" by 1 male on the right side of the tank, and 1 female is owned by the another male on the left side of the tank. The two "spare" males live in/under the ocean rock, one of the spares at the front has a shell but prefers the rock. As it stands, there has been no major territorial problems for a good 6 weeks now, everything seems to have settled down.
The fry posted in this thread on March are all still alive and doing well. We've only had one obvious fry death out of the ~30+ now in the tank (not counting any that have been eaten). The fry are at the juvenile stage - play fights etc.
We've got the QT tank setup as of the weekend with some 90degree PVC plumbing pipe corners. Have been catching the biggest fry slowly and moving them to that tank. Catching them is proving extremely annoying, hence the PVC pipe in the QT tank. Planning on moving the fry on to local fishkeepers, had some interest already. These multies breed like rabbits!
I'll get some pictures done soon, light in here is terrible tonight so it'll be a day or two :)
You want to replace the yukky brown poly-pads, once every week or every two weeks. They won't be doing what they are meant to (mechanical filtration, collecting bits of muck etc. you don't want). I have noticed they tend to reach a point where they just tend to leech crap back out again. They also bung-up pretty bad and effect flow-rate.
The main body of bacteria is in your blue sponges under the polypad.