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How's your copepod population? They usually bulldoze diatoms.

Pretty sure I'd get splashing water noises too from my emergency overflow with a standing wave. Listening to some videos online it sounds pretty noisy even without this.

Ah ok so it isn't a powder. If it was a powder you mix into a solution, that would be the dead giveaway with it getting cold. The idea behind using ammonium vs. nitrate is that it's more energy efficient for bacteria and corals to use it since they don't need to convert it as far...

When you dose the ESV nitrate, is the solution getting cold? That would likely indicate it is calcium nitrate since it's endothermic. Have you tried ammonium bicarbonate yet?

You can either hide a bin with sand or create a natural rubble zone for the wrasses. Mine enjoy the rock areas that are hollow with multiple entry holes. Think a soccer ball but all the black patches are holes.

What's your budget? We have a lot of hoarders in the club here and you likely can find used lights way cheaper then new.

Welcome to the club! 40 breeder with a 2x4 stand is the old school 90s budget build that you can't go wrong with. What's your lighting on top?

Glad Cos was able to help you out @Solitaryensis

What the heck. Looks like it had GFO mixed in. If you're worried about fines, I've been putting my carbon bag in a filter sock and hanging it in my sump, so they can't get out.

Try those tips, then turn off all your blue/violet LEDs, and turn on the warm white ones if you have control of that easily.

Yeah no idea what it is then. Try the urchin, it might at least loosen the bits if they're not etched into the acrylic. But a better macro picture would help. Then maybe the other acrylic gurus could chime in like @Kensington Reefer

Fingernail doesn't take it off either? Hard to tell from the picture, can you take a close up macro shot with the whites only on? Only thing I had issues with in the past was a specific species of pink coralline algae. To this day the only thing that got it off was a blunted metal scraper that...

Also pretty sure they're discontinued so keep that in mind Will

I think Rich uses them

My joke is that you'd need to kill/cut it to know!

It will be blue if your water parameters are terrible too!

Eric used a saw to cut the frame and we used 90 degree attachments that it came with to make a square cut out. Kinda janky but it works. I still would want a custom polycarbonate lid in the future to block less light in the center of my tank but they're pricey.

If you want to spend and want a high quality custom sump, you should go with MRC https://www.mrcamerica.com/custom/ They have some base 48x18x18 sumps that would work for you too, if you just retrofit the drain area to an off the shelf filter roller https://www.mrcamerica.com/bio-sumps/ Other...

Whomever told you that hasn't been in the hobby long enough. We kept things long term under garbage compact fluorescent tubes back in the 90s and early 2000s. These blades can generate a lot of light, especially when in a shallow system like this. What's your water change and mineral replacement...

Halymenia stipitata