I have a 40g Aquatop reef tank. I set this up in December of 2021 and tank was doing good until the past 2 months but it’s getting bad and wondering if recoverable?
livestock
2 small Ocelllaris clown fish a a purple fish
2 red legged hermit crabs
6 astrea snails
frogspawn, Zoas, small green nepthea, ricordea and Galaxia. almost all are from frags
i ungraded the stock lights to a radio XR15 blue and a eco tech MP10. auto top off. Stock return pump and skimmer.
10 gallon water changes every month.
I have been very careful not to over feed. I add a pinch or Omega Marine flakes most days and usually 3 days a week I feed a quarter of a cube of frozen mysis.
for the past 2 months the corals do not open much. A month ago a large bubble algae outbreak started and is still there. I added an emerald crab that has started to make a dent there. There has been a green algae on the glass that requires hard scrubbing to remove. Now the dreaded green hair algae is starting. I also see some sort of white film on the surface. I have the return pump aimed towards the surface to move it around but i do notice not allot of flow going towards to overflow. Skimmer production is very low and I have it lowered down ( highest water level) and can’t adjust it more.
tested ammonia, nitrite, nitrate and they all show zero.
if there is hair algae that means most likely phosphates are present.
any ideas on recovery process? Do not want to pull the LR to scrub the tank. If that is the case I may just tear the whole thing down. There is no sump so don’t know what options there are for a refugium, phosban reactor or a different skimmer.
thoughs before these corals die off?

livestock
2 small Ocelllaris clown fish a a purple fish
2 red legged hermit crabs
6 astrea snails
frogspawn, Zoas, small green nepthea, ricordea and Galaxia. almost all are from frags
i ungraded the stock lights to a radio XR15 blue and a eco tech MP10. auto top off. Stock return pump and skimmer.
10 gallon water changes every month.
I have been very careful not to over feed. I add a pinch or Omega Marine flakes most days and usually 3 days a week I feed a quarter of a cube of frozen mysis.
for the past 2 months the corals do not open much. A month ago a large bubble algae outbreak started and is still there. I added an emerald crab that has started to make a dent there. There has been a green algae on the glass that requires hard scrubbing to remove. Now the dreaded green hair algae is starting. I also see some sort of white film on the surface. I have the return pump aimed towards the surface to move it around but i do notice not allot of flow going towards to overflow. Skimmer production is very low and I have it lowered down ( highest water level) and can’t adjust it more.
tested ammonia, nitrite, nitrate and they all show zero.
if there is hair algae that means most likely phosphates are present.
any ideas on recovery process? Do not want to pull the LR to scrub the tank. If that is the case I may just tear the whole thing down. There is no sump so don’t know what options there are for a refugium, phosban reactor or a different skimmer.
thoughs before these corals die off?

. Reduce your photo period, and if possible, tune your spectrum. Avoiding white light will help. Your fish won't care much at all, and the coral only want their favorite flavors of light.

Magnesium is very important in a reef tank. Just like our bodies, if Magnesium gets out of wack so do other things.

