Honest, fact-checked saltwater & reef care — guides, myth-busters, free keeper tools, and the "is this normal?" answers, for reef folk.https://coralkin.com/https://coralkin.com/blog/aquascaping-a-reef-tank/https://coralkin.com/blog/aquascaping-a-reef-tank/How to aquascape a reef tank: build a stable, open rockwork that flows well and gives corals room to grow, with the principles and common mistakes.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/beating-reef-tank-algae-and-pests/https://coralkin.com/blog/beating-reef-tank-algae-and-pests/A calm guide to reef tank algae and pests: the new-tank uglies, cyano, dinos, hair algae and aiptasia - what causes them and how to beat them.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/best-beginner-corals/https://coralkin.com/blog/best-beginner-corals/The best beginner corals: forgiving soft corals and a few easy LPS that tolerate modest light and stable water, with the honest caveat on each.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/best-nano-reef-fish/https://coralkin.com/blog/best-nano-reef-fish/The best nano reef fish: small, peaceful, reef-safe fish for tanks around 10-30 gallons, with honest tank sizes, jumper warnings and stocking caveats.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/cleanup-crew-guide/https://coralkin.com/blog/cleanup-crew-guide/A reef cleanup crew guide: which snails, hermits, crabs and shrimp eat which algae and detritus, how many you need, and why overstocking starves them.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/coral-aggression-and-placement/https://coralkin.com/blog/coral-aggression-and-placement/Coral aggression and placement: how corals fight with sweepers, stinging and chemical warfare, and how to space them so your reef stays peaceful.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/coral-care-for-beginners/https://coralkin.com/blog/coral-care-for-beginners/Coral care for beginners: keep soft corals, LPS and SPS in the right order - light, flow, placement, feeding and the water chemistry corals need.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/cyanobacteria-red-slime-algae/https://coralkin.com/blog/cyanobacteria-red-slime-algae/How to get rid of cyanobacteria (red slime) in a reef tank: what it is, why it blooms (flow and nutrient balance), and the honest fix that lasts.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/dinoflagellates-in-a-reef-tank/https://coralkin.com/blog/dinoflagellates-in-a-reef-tank/How to beat dinoflagellates (dinos): why they bloom in zero-nutrient tanks, the counter-intuitive fix (feed the tank), and the full battle plan.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/do-clownfish-need-an-anemone/https://coralkin.com/blog/do-clownfish-need-an-anemone/Do clownfish need an anemone? No. Captive-bred clownfish thrive without one - here is the fact-check, and when an anemone is actually a good idea.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/dosing-a-reef-tank/https://coralkin.com/blog/dosing-a-reef-tank/Dosing a reef tank: when water changes stop being enough, how to dose alkalinity, calcium and magnesium safely, and the daily limits to respect.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/fowlr-vs-reef-tank/https://coralkin.com/blog/fowlr-vs-reef-tank/FOWLR vs reef tank compared: cost, difficulty, lighting, chemistry and which fish you can keep - to help you choose your first saltwater setup.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/how-much-does-a-reef-tank-cost/https://coralkin.com/blog/how-much-does-a-reef-tank-cost/How much a reef tank really costs: the upfront gear, the ongoing running costs, and why a nano is not as cheap as it looks. An honest breakdown.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/how-to-acclimate-new-fish-and-corals/https://coralkin.com/blog/how-to-acclimate-new-fish-and-corals/How to acclimate new fish, corals and inverts: the drip method step by step, why to match temperature and salinity, and never to pour in shop water.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/how-to-cycle-a-saltwater-tank/https://coralkin.com/blog/how-to-cycle-a-saltwater-tank/How to cycle a saltwater tank: what the nitrogen cycle is, how to start it, how long it takes, and how to know when it is safe to add livestock.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/how-to-get-rid-of-aiptasia/https://coralkin.com/blog/how-to-get-rid-of-aiptasia/How to get rid of aiptasia in a reef tank: why crushing backfires, which predators actually work, how to inject them, and how to stop them coming back.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/how-to-get-rid-of-bubble-algae/https://coralkin.com/blog/how-to-get-rid-of-bubble-algae/How to get rid of bubble algae (Valonia): the truth about popping it, whether emerald crabs work, safe manual removal, and how to stop it spreading.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/how-to-quarantine-new-saltwater-fish/https://coralkin.com/blog/how-to-quarantine-new-saltwater-fish/How to quarantine new saltwater fish: why a QT tank is the best habit in the hobby, how to set one up, how long to observe, and what to watch for.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/how-to-start-a-saltwater-aquarium/https://coralkin.com/blog/how-to-start-a-saltwater-aquarium/How to start a saltwater aquarium the honest way: tank size, RO/DI water, cycling first, then fish and coral - a calm, no-panic beginner roadmap.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/is-a-tang-ok-in-a-small-tank/https://coralkin.com/blog/is-a-tang-ok-in-a-small-tank/Is a tang okay in a 55-gallon or nano tank? No. Tangs need about 6 feet of swimming room - here is the fact-check on tank size and ich.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/keeping-anemones-with-clownfish/https://coralkin.com/blog/keeping-anemones-with-clownfish/Keeping anemones with clownfish: why an anemone is an advanced, light-hungry animal, and how to give a bubble-tip the mature, stable tank it needs.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/led-vs-t5-reef-lighting/https://coralkin.com/blog/led-vs-t5-reef-lighting/LED vs T5 reef lighting compared: coverage, colour, cost, control and coral growth - the honest trade-offs, and why many keepers run a hybrid of both.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/marine-ich-and-velvet-what-to-do/https://coralkin.com/blog/marine-ich-and-velvet-what-to-do/Marine ich and velvet in reef fish: how to spot them, why quarantine is the real fix, and how they are treated - triage guidance, not a diagnosis.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/nano-reef-vs-bigger-tank/https://coralkin.com/blog/nano-reef-vs-bigger-tank/Nano reef vs a bigger tank for beginners: why small is cheaper but less stable, why bigger is more forgiving, and how to choose your first reef size.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/new-tank-syndrome-and-the-ugly-stage/https://coralkin.com/blog/new-tank-syndrome-and-the-ugly-stage/The reef tank ugly stage explained: diatoms, algae and cyano in a new saltwater tank, why it happens, how long it lasts, and why patience beats chasing it.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/ocellaris-vs-percula-clownfish/https://coralkin.com/blog/ocellaris-vs-percula-clownfish/Ocellaris vs percula clownfish: the false and true Nemo compared - size, markings, temperament and care - and which is the better first clownfish.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/preventing-a-reef-tank-crash/https://coralkin.com/blog/preventing-a-reef-tank-crash/Preventing a reef tank crash: why stability is everything, the alkalinity swings and neglect that cause crashes, and how to spot and stop RTN and STN.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/reef-aquarium-equipment/https://coralkin.com/blog/reef-aquarium-equipment/Reef tank equipment explained: what you actually need vs what can wait - skimmer, sump, return pump, powerheads, heater, RO/DI, ATO and controller.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/reef-lighting-flow-and-par-explained/https://coralkin.com/blog/reef-lighting-flow-and-par-explained/Reef lighting and flow explained: how much PAR soft corals, LPS and SPS want, how to acclimate light safely, and how much water flow a reef needs.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/reef-tank-water-chemistry-explained/https://coralkin.com/blog/reef-tank-water-chemistry-explained/Reef water chemistry made simple: salinity, alkalinity, calcium, magnesium, nitrate and phosphate - what to aim for and why stability matters most.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/rodi-water-for-reef-tanks/https://coralkin.com/blog/rodi-water-for-reef-tanks/Why reef tanks use RODI water not tap: what tap water brings in (phosphate, nitrate, silicate, metals), how RO/DI works, and whether to buy or make it.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/saltwater-water-changes-and-maintenance/https://coralkin.com/blog/saltwater-water-changes-and-maintenance/Saltwater water changes and maintenance: why and how to change reef water, how often, matching salinity and temperature, and a simple weekly routine.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/should-nitrate-and-phosphate-be-zero/https://coralkin.com/blog/should-nitrate-and-phosphate-be-zero/Should nitrate and phosphate be zero in a reef tank? No - zero starves corals and feeds dinos. The modern target is low but not zero.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/soft-vs-lps-vs-sps-corals/https://coralkin.com/blog/soft-vs-lps-vs-sps-corals/Soft vs LPS vs SPS corals compared: light, flow, chemistry and difficulty for each group, and the order to keep them in as a beginner reefer.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/why-is-my-coral-not-opening/https://coralkin.com/blog/why-is-my-coral-not-opening/Why your coral is not opening: the real causes - flow, light, placement, alkalinity swings, pests and settling in - and how to work through them.Sun, 06 Sep 2026 00:00:00 GMThttps://coralkin.com/blog/your-first-saltwater-fish/https://coralkin.com/blog/your-first-saltwater-fish/Choosing your first saltwater fish: the best beginner-friendly options, how many to add, quarantine, and how to acclimate them without shock.Sun, 06 Sep 2026 00:00:00 GMT