Reddit mentions: The best aquarium decor coral

YES! You can call me the silk plant expert LOL! (I know I know... live plants are 1000% better, but not everyone is ready for that full-planted tank yet)

https://www.amazon.com/biOrb-Plant-medium-green-purple/dp/B003KGBJ06 <-- my two bettas LOVE these! I always catch them lounging on the big broad leaves. AND the shorter ones for foreground: https://www.amazon.com/biOrb-Plant-medium-green-purple/dp/B003BG2TEA/

I don't have this pack but, it looks like another great option (I want it but my tanks are full for now): https://www.amazon.com/biOrb-Silk-Plant-small-green/dp/B003BG4VIW/

(as you can see, I'm kind of a fan of the BiOrb silk plants xD haha! They're really great and my bettas do like lounging around on them)

My Hikaru can vouch for the BiOrb silk plants (lol look who didn't want to have his nice nap on the BiOrb silk plant leaf disturbed): https://i.imgur.com/7miG7h5.mp4

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Some other options (not vouching for or against, but might be good options):

https://www.amazon.com/Smarlin-Artificial-Aquarium-Plastic-Non-Toxic/dp/B07J4PX75P/ mid or foreground shorter plants.

https://www.amazon.com/Marina-PP108-Naturals-Indigo-Waffle/dp/B01MTOC21F/

https://www.amazon.com/Vibran-Sea-Flowering-Sword-Silk-Style-Aquarium/dp/B001LUMTMK

AND SILICONE PLANTS! They're soft too!

https://www.amazon.com/SunKni-Decorations-Ornaments-Artificial-Landscape/dp/B07NLCGRN1/

https://www.amazon.com/SunKni-Decorations-Ornaments-Artificial-Landscape/dp/B07NLB8JYJ/

https://www.amazon.com/QSSTECH-Decorations-Fishkeepers-Freshwater-Saltwater/dp/B07JNRNGZW/

https://www.amazon.com/Hygger-Underwater-Artificial-Decoration-Accessories/dp/B07TP27Z4R/

https://www.amazon.com/Aquatop-Aquatic-Supplies-Silicone-Aquarium/dp/B01FWRKSHA/

https://www.amazon.com/Aquatop-Aquatic-Supplies-Silicone-Aquarium/dp/B01FWRKSC0/

Hello Shep! OP, hope you don't end up so busy saving the galaxy you forget to feed her :(

As for fishtank decor I couldn't find any rocketship ones, but I did find these that look cool, if you'd like to go for sort of an "antique Prothean" theme.

https://www.amazon.com/Ble-Ornmt-Ufo-Crash-Cave/dp/B00FKVFCKC

https://www.amazon.com/RIBBON-PRODUCTS-030157015909-Environments-Crashed/dp/B00C3ESXYG (this one looks great for an "ancient" look but it's small, the other one seems to be a lot bigger)

https://www.amazon.com/Uxcell-Plastic-Aquarium-Accent-Underwater/dp/B00H56CBVI (these look like the trees from the Presidium)

https://www.amazon.com/JW-Pet-ActivAir-Floating-Satellite/dp/B000FHGMZU/

https://www.amazon.com/Glowing-Artificial-Decorative-Aquarium-Ornament/dp/B00ST6SX24

https://www.amazon.com/Uniclife-Artificial-Decorative-Aquarium-Ornament/dp/B01EY327BI

https://www.amazon.com/Uniclife-Jellyfish-Ornament-Decoration-Aquarium/dp/B06XRNV4G2

https://www.amazon.com/Uniclife-Silicone-Decorations-Artificial-Ornament/dp/B01MSTXAC5

https://www.amazon.com/Uniclife-Ornament-Artificial-Decoration-Landscape/dp/B01N6BMKCL

Glowing plants would definitively help bring up the "alien" look I think. Uniclife has a bunch! Or a "Kahje" look if you put in some pink jellyfish alongside the "Prothean ruins" :P

I have two identical blastos I have clipped off with a coral cutter and glued to rocks. Pre-mix some reef epoxy (I use Oceans Wonders) and get a tube of superglue ready. Then just take it out of the tank, grab onto the pillar part, and squeeze the coral cutter right where it meets the plug. It'll break. Then dab on some superglue, press the epoxy where you want it, dab some more glue on the bottom of the pillar, and stick the pillar to the epoxy. Hold in place for 30 seconds-1 minute. It'll stick, and the coral will be happy. Good luck.

Oops, it was actually $50 for 40 lbs of rock.
https://www.amazon.com/gp/product/B00F8DVAO4/ref=oh_aui_detailpage_o04_s01?ie=UTF8&psc=1

Here's the powerhead i got:
https://www.amazon.com/SunSun-JVP-101A-2-unit-Maker-Suction/dp/B00DY9ZAFO/ref=sr_1_1?ie=UTF8&qid=1480355284&sr=8-1&keywords=saltwater+powerhead

I'm not too familiar with a sump.

can you help pick out some parts for what i'd need because I'd be interested in doing less frequent water changes if at all possible.

also can an overflow be an alternative to a sump?
https://www.amazon.com/Eshopps-PF300-Overflow-Aquariums-75-Gallons/dp/B00CJ2575K/ref=pd_bxgy_199_img_3?_encoding=UTF8&pd_rd_i=B00CJ2575K&pd_rd_r=S89NJCB19GMJX2XNXY57&pd_rd_w=jEUDa&pd_rd_wg=N19XF&psc=1&refRID=S89NJCB19GMJX2XNXY57

Also i found this sump that has good reviews... i just don't know what other parts i'd need with it to make it work
https://www.amazon.com/Aqueon-34500-ProFlex-Model-44-55-Gallon/dp/B0036S1FQG/ref=sr_1_1?ie=UTF8&qid=1480355334&sr=8-1&keywords=saltwater+sump

They are fluorescent jellyfish :D I can't have real fish, sooo I wished for these haha. ♥

They lock in pretty good on their own, but I have holes drilled with plastic dowels and some aquarium safe silicone holding them all together.

These are the rocks I have: https://www.amazon.com/gp/product/B00F8DVAO4/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1

I have 80 pounds.

Instant Ocean Reef Crystal's salt is reasonably cheap and people seem to trust it. As for rock, I used this:
https://www.amazon.com/dp/B00F8DVAO4/ref=cm_sw_r_cp_apa_i_6yBTDb30B368Q

It's 40 lbs for $55, prime shipping. Just make sure you pressure wash it to get the sand out of the crevasses, but it's dry, pest free rock that will cycle with your tank. Since your on a budget, you can take your time and cycle it properly.

Also, I'd suggest watching 52 weeks of reefing. https://www.youtube.com/playlist?list=PLBaMLrfToJyybUT18OE3fMomFb9XU0ffC

A lot of it won't apply to you, but it covers just about everything.

I grabbed these ones off Amazon, will they leech?
How hard are the moss balls and vallisneria to take care of?
https://www.amazon.ca/Yuxier-Aquarium-Glowing-Mushroom-Ornament/dp/B074FSZ6RQ/ref=sr_1_16?keywords=glo+fish+decorations&qid=1565975009&s=gateway&sr=8-16

Nature's Ocean 12-Inch Coral Base Rocks for Aquarium, 40-Pound https://www.amazon.com/dp/B00F8DVAO4/ref=cm_sw_r_cp_api_i_8nyOCbJVH0Q9T

This is the best deal on the internet. I’d buy 2 packs which will give you 80 pounds which i think is enough. They say 1 pd per gallon but I think 80 is plenty.

If not go on ur Facebook market place and try to find some. That always worked for me.

If not that, pretty much every town / local area has a Facebook page for local reefers, I’m sure someone has extra.

Like this?

I did come across this one and then I found this corner one on amazon, and they are both cheap