What are you adding to your tank?

[daniella3d]

I guess your zoanthids must be really happy because they react strongly to any sudden change in alkalinity...a very slow drop won't affect them as a suddent increase.

But what about that clam? I guess it does not have much calcium to grow its shell...

Originally Posted by Mike-fish

i dose nothing and virtually never do water changes on my cube 29G bc (drip lines for new stock top up) have 2 lps 1 geneopora 1 4" clam and tonnes of zoas.

[e46er]

I dose Calcium chloride, baked baking soda , and magFlake
All bought in bulk chemical form as its MUCH MUCH cheeper
Cal /alk is dosed via doser mag is done manually usually 4-6 weeks my tank will need 50 -100 ppm

[Mike-fish]

Originally Posted by daniella3d

I guess your zoanthids must be really happy because they react strongly to any sudden change in alkalinity...a very slow drop won't affect them as a suddent increase.

But what about that clam? I guess it does not have much calcium to grow its shell...

all levels are normal ca2+ is a little high alk is steady. i could take water tests if you want