So I became smitten with these little guys after reading about them. I have always wanted a shrimp tank, but never set one up. I put a simple 5 gallon tank together 1/20/2020 "water volume of 3 gallon after sand and lava rocks". Even though, I live in the northwest "NY"and I was worried about the cold but I took a leap of faith and did not add a heater. I did run the stock filter with a pre-filter sponge and padding to polish the water though. I rinsed and rinsed my sand along with my spare tank, but it never seems to fail that I get some type of hair in my tanks "multiple dogs & cats"

So my questions are, the temp is holding steady at 64 degrees, from what I have read that is ok. My lighting is just the basic stock LED, which is not strong. I have the lights set up to run a 12h off and on cycle. I did order starter algea from another Supershrimp vender, which I'm kinda regretting now. I added it 2 weeks ago? It looked super green, but is now starting to fade in color. Not browning yet, but that's what it seems to be headed torwards. I was not sure if the temp is just too cold for the algea or if maybe it's the current due to filtration?
I will be removing the filter likely tomorrow, leaving the led light as the only thing running on this tank. I have been diligently stirring up my sand bed every few days to really polish that water "I know OCD here".
After the filter goes, should I wait a few more weeks and if my current algea does not improve, order a starter from here along with a special moss ball? I am not in a super rush as I do not plan on ordering my shrimp until at least spring due to my colder weather up here, but at the same time I want to make sure the tank can really feed the shrimp.
I also purchased some of those shrimp mineral stones that are white, am I assuming correctly, these will help with my calcium? I can also add a cuttle bone as well if that helps.
I did check my salinity and it's in the upper range for brackish water using the Instant Ocean sea salt brand. I used half distilled water and half spring water to start this tank, but will likely pick up more gallons of distilled to slowly change the water out. I've read both it's ok and it's not ok to use spring water. Did not do any other testing as it's mentioned it's not needed.
Thanks in advance