Ro filters n question n frag plug?

[dynamictank]

What type of cartridge is this r they both the same
Could this be the reason for brown algae on my sand n sh-it.

I've been looking online, n can't seem to find this type of frag plug I bought maybe 100pc two-3 years ago n ran out yesterday. These are the best type ceramic n smooth coral took on a base in three days. Plus I have a deep sand bed so I just put right in sand n nothing nocks them over

And what is up with the sand. Spread all over I have high current new lights u think it is the ro unit.

 

[ZANYMASTER]

They could mean that your lights are old.

 

[KathyC]

How long has the tank been set up and do you have a TDS meter? That would tell you if your RO filters need to be replaced.

 

[dynamictank]

I have Tds at office tank these lights can't be old it's not a year old it started when I sent these out for repair when I put my old lights back on for a week it started small n is know all over I put phosban in de nitrite n chemi pure n I've done water changes

 

[ZANYMASTER]

I have to Bump this thread cause I'm in the same boat.My TDS is reading zero,I do the water changes,New bulbs but it seems localized to one area of the tank with the brown stuff on the sand..I changed all the cartridges but the carbon but it's not old.I'll change that one too or my Meter is bad.I test the tap and it's high so I know it works-duh.

 

[masterswimmer]

The pic of the two cartridges both look like carbon pre-filters.

Russ

 

[mic_1011]

not to get off topic, but is a tds meter necessary, what does it test for, and where can u buy one? one other thing just saw them on ebay cheap $10-$20....they any good or hong kong trash?

 

[dynamictank]

I'm no expert on Tds but it's def good to have

 

[masterswimmer]

TDS - Total Dissolved Solids

If you're using an RO/DI filtration system, you should be using a TDS meter to help you to determine the appropriate time to change your filters. Since we look for RO/DI water to have zero TDS, any increase in readings equates to degradation or clogging of the filters in your RO/DI filter.

The way to extend the life of your expensive RO Membrane you should replace the sediment pre-filter and carbon pre-filter frequently. Those pre-filters are inexpensive to change and help to extend the useful life of your RO Membrane and DI Resin.

Hope this helps,
Russ