clams can be very sensitive to sudden changes ...especially alkalinity and salinity ..so when you did your cleaning it just was too much ...i lost a clam before after intense cleaning...
Bulb replacement and electricity costs are always a factor to consider..to me leds on a little tank are a good and easy solution...easy to install to and nice to look at...just a thought..
I use those leds for over half a year now over my deepsea nano and i am
Very pleased..no problems..i keep acans,chalices,montis and a Rbta ..however i had a couple of sps who died on me..if sb wants to check them
Out send me a pm and u can drop by..