Blackout works great. Has to be totally blacked out though, not even a peep of light. I conquered Dino's with a complete blackout for 5days. Covered the whole tank with my motorcycle cover. Also, when I lighted up, replaced fixture with all new bulbs.

so i got home from work yesterday, ready to do a water change and my nicests, most expensive clam is dead. retracted and gaping.
it was looking good the night before


other 3 clams looked fine and are still fine now.

I highly doubt it was from the cemi clean. I have 8 clams and cemiclean has never bothered them.
I'm guessing your clam that died is the blue maxima from Steve. I also have one.
Sorry for loss

Sorry to hear Marco

I have to believe you had some underlying condition in your tank, something was sick, infected, dieing or something and that is what was fueling your cyano, chemiclean is an oxidizer so it would probably kill something that was sick or dieing.

yeah thats the one. is yours still doing ok?

Yeah it's good but highly irritable. That's Alot of money to loose. A ****ty way to wake on a sat

But cal is right. The cemi clean will work like hydrogen peroxide does on a wound. Oxidizing dead flesh. but if you clam was good yesterday it seems odd to die in one day.

I never read the thread completely as I couldn't be bothered with the arguments but was that your first wc since the cemiclean. When ever I was used that product. It was about 150 gal worth of changing. On a 250 g system

Yeah I had waited 48 hours and was ready to do a water change. The clam died sometime 30-48 hours after the chemiclean.

Nothing else had changed in the tank.

The clam was doing really well, it had even attached itself to the rock I had it on. There was sign of new growth.

+1......or it could be that perhaps 14 months with minimal water changes are finally catching up with the system.....

So it only effects one clam and nothing else?

I know you say wc are not realistic for you. And I would understand if fowlr. But it may help just to do a monthly change.
I know you dose the essential and everything looks great but even once a month will only take a hour of your time.

I dose cal alk mag. And prodibio. I did try the route of no wc. But wasn't happy with growth rates in my tank.
I do a biweekly change of 50 gallons which I do while cleaning tank. I believe it does wonders as my cheato nor mangroves will grow. I started with a base ball size chunk and 6 months later it's the same size.
Wc never did help with my cyano problems but after using cemiclean I switched to RODI and cut feedings down to half. My tank hasn't seen cyano since and the wc seem to keep my tank cleaner