levels

I purchased a tank off of Facebook marketplace. I was understood it to be a cycled tank. But when purchased I was only given 5 gallons of the water. There for I made all new water. I know my tank is acting a little funny and not opening up like it should. I bought the regular test kits and all...

I have a 75gallon tank set up for about 2 years. sump has live rock, and so does the tank. Nyos120 skimmer tht only skims less than 1/2 the cup like every 10 days before I clean cup. growing Cheato. Using filter floss I clean every week or so. Refugium light is on for 8hrs and use Rodi water...

Hi all,my tank reached the end of its cycle give or take a month/month 1/2 ago. I've since added 2 clowns, and a snowflake eel. I've gone though a 40% water change 3 days ago due to a alkalinity issue I wasn't aware of. Used RODI water to complete the change. Anyways, I'm leaving on a 5 day...

I can't seem to raise magnesium, I am worried that if I put anymore in that maybe the levels will come up overnight for some reason? Pls help not sure if I am wasting my 2 part magnesium mix. My levels at the start of the day was 1140 magnesium, it is now at 1185. Can't seem to get it to 1200.

So I have been struggling for awhile to get my tank good enough to house soft corals, I have always had problems keeping soft corals until recently most of the new ones I have been adding are doing good for once, so I decided to test my parameters and they all look fine expect magnesium witch is...

So my phosphate is reliable between 0.03-0.06, ranging between there month to month. However over the last 4-6 months, my nitrate has been going from 5, to 3, to 1... to now just barely detectable. Why do you think my phosphate can stay so consistent, but my nitrates are diminishing? Any ideas...

So just 2 days ago i preformed a water change as my nitrate levels read at a high 25. I’d say I did about a 45% water change with r.o water. But when I checked again today my nitrate readings are exactly the same? The only thing I can think of is doing another water change, but i don’t want to...

I need some advice from real people- because it seems like Fluval owns Google. All I can get is a dang commercial or store ad when I write anything about lighting levels for this light. I have a 90- gallon that has been doing well for over 3 years. Mostly a fish only, but then, last year, I...

So I currently have a 100 gallon mixed reef aquarium, and I am having a big problem keeping phosphates and nitrates down. I am currently running 1 bag of phosguard with 3 bags of fluval phosphate remover and still can not get the levels down even with water changes. Before 25 gallon water...